1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
12 buffer overrun for (non-chunking) other transports.
14 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
15 TLS1.3, means that a server rejecting a client certificate is not visible
16 to the client until the first read of encrypted data (typically the
17 response to EHLO). Add detection for that case and treat it as a failed
18 TLS connection attempt, so that the normal retry-in-clear can work (if
21 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
22 and/or domain. Found and fixed by Jason Betts.
24 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
25 configuration). If a CNAME target was not a wellformed name pattern, a
28 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
29 the OS reports them interleaved with other addresses.
31 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
32 used both for input and for a verify callout, both encrypted, SMTP
33 responses being sent by the server could be lost. This resulted in
34 dropped connections and sometimes bounces generated by a peer sending
37 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
38 string. Previously it was possible to cause undefined behaviour in a
39 library routine (usually a crash). Found by "zerons".
41 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
44 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
45 API was removed, so update to use the newer ones.
48 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
49 to changes apparently associated with TLS1.3 handling some of the APIs
50 previously used were either nonfunctional or inappropriate. Strings
51 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
52 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
53 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
54 This affects log line X= elements, the $tls_{in,out}_cipher variables,
55 and the use of specific cipher names in the encrypted= ACL condition.
57 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
58 verification result was not updated unless hosts_require_ocsp applied.
60 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
61 queue_list_requires_admin set to false, non-admin users were denied the
68 JH/01 Remove code calling the customisable local_scan function, unless a new
69 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
71 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
72 non-signal-safe functions being used.
74 JH/03 Bug 2269: When presented with a received message having a stupidly large
75 number of DKIM-Signature headers, disable DKIM verification to avoid
76 a resource-consumption attack. The limit is set at twenty.
78 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
79 report of oldest_pass in ${authres } in consequence, and separate out
80 some descriptions of reasons for verification fail.
82 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
83 files in the spool were present and unlocked. A queue-runner could spot
84 them, resulting in a duplicate delivery. Fix that by doing the unlock
85 after the unlink. Investigation by Tim Stewart. Take the opportunity to
86 add more error-checking on spoolfile handling while that code is being
89 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
90 No known attacks, no CVE, this is defensive hardening.
92 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
93 a queue-runner could start a delivery while other operations were ongoing.
94 Cutthrough delivery was a common victim, resulting in duplicate delivery.
95 Found and investigated by Tim Stewart. Fix by using the open message data
96 file handle rather than opening another, and not locally closing it (which
97 releases a lock) for that case, while creating the temporary .eml format
98 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
100 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
101 $sender_verify_failure/$recipient_verify_failure to "random".
103 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
106 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
107 Previously this would segfault.
109 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
112 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
113 like zero, since the resolver should be doing this for us, But we need one
114 as a CNAME but no MX presence gets the CNAME returned; we need to check
115 that doesn't point to an MX to declare it "no MX returned" rather than
116 "error, loop". A new main option is added so the older capability of
117 following some limited number of chain links is maintained.
119 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
121 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
122 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
123 now-deprecated earlier definitions used only specified the range up to TLS
124 1.2 (in the older-version library docs).
126 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
128 JH/15 Rework TLS client-side context management. Stop using a global, and
129 explicitly pass a context around. This enables future use of TLS for
130 connections to service-daemons (eg. malware scanning) while a client smtp
131 connection is using TLS; with cutthrough connections this is quite likely.
133 JH/16 Fix ARC verification to do AS checks in reverse order.
135 JH/17 Support a "tls" option on the ${readsocket } expansion item.
137 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
138 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
139 Previously the "utf8" would be re-prepended for every additional message.
141 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
142 Previously thery were accepted, resulting in issues when attempting to
143 forward messages to a non-supporting MTA.
145 PP/02 Let -n work with printing macros too, not just options.
147 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
148 one parent address was copied, and bogus data was used at delivery-logging
149 time. Either a crash (after delivery) or bogus log data could result.
150 Discovery and analysis by Tim Stewart.
152 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
153 Previously if the string ended mid-character, we did not insert the
154 promised '?' replacement.
156 PP/04 Documentation: current string operators work on bytes, not codepoints.
158 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
159 should pack well giving a smaller memory footprint so better caching and
160 therefore performance. Group the declarations where this can't be done so
161 that the byte-sized flag variables are not interspersed among pointer
162 variables, giving a better chance of good packing by the compiler.
164 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
165 non-null, to avoid issues with sites running BATV. Previously reports were
166 sent with an empty envelope sender so looked like bounces.
168 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
169 The ignore_error flag wasn't being returned from the filter subprocess so
170 was not set for later routers. Investigation and fix by Matthias Kurz.
172 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
173 and a msg:complete for the whole, when a message is manually removed using
174 -Mrm. Developement by Matthias Kurz, hacked on by JH.
176 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
177 a "Gnu special" function, asprintf() in the DB utility binary builds; I
178 hope that is portable enough.
180 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
181 requiring a known-CA anchor certificate; make it now rely entirely on the
182 TLSA as an anchor. Checking the name on the leaf cert against the name
183 on the A-record for the host is still done for TA (but not for EE mode).
185 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
186 included in delivery lines for non-proxied connections, when compiled with
187 SUPPORT_SOCKS and running with proxy logging enabled.
189 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
190 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
191 move the existing event to fire before the normal logging of message
192 failure so that custom logging is bracketed by normal logging.
194 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
195 msg:fail:internal event. Developement by Matthias Kurz.
197 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
198 far too small for todays use of crypto signatures stored there. Go all
199 the way to the max DNS message size of 64kB, even though this might be
200 overmuch for IOT constrained device use.
202 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
203 copy a string over itself. The library routine is documented as not
204 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
206 JH/32 For main options check_spool_space and check_inode_space, where the
207 platform supports 64b integers, support more than the previous 2^31 kB
208 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
209 the previous G, M, k.
211 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
212 $authenticated_fail_id variable on authentication failure. Previously
215 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
216 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
217 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
218 GNUTLS_SEC_PARAM_MEDIUM.
220 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
221 side. Previously we would continue as if no SNI had been received.
223 JH/36 Harden the handling of string-lists. When a list consisted of a sole
224 "<" character, which should be a list-separator specification, we walked
225 off past the nul-terimation.
227 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
228 causes) even when the retry time is not yet met. Previously they were
229 not, meaning that when (say) an account was over-quota and temp-rejecting,
230 and multiple senders' messages were queued, only one sender would get
231 notified on each configured delay_warning cycle.
233 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
235 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
236 cipher-suites, an error can be left on the stack even for a succeeding
237 accept; this results in impossible error messages when a later operation
240 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
241 return error codes indicating retry. Under TLS1.3 this becomes required.
243 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
244 it only wrote the new authenticators, resulting in a lack of tracking of
245 peer changes of ESMTP extensions until the next cache flush.
247 JH/41 Fix the loop reading a message header line to check for integer overflow,
248 and more-often against header_maxsize. Previously a crafted message could
249 induce a crash of the recive process; now the message is cleanly rejected.
251 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
252 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
258 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
259 When redis_servers is set to a list of > 1 element, and the Redis servers
260 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
261 case of MOVED into a DEFER case instead, thus moving the query onto the
262 next server in the list. For a cluster of N elements, all N servers must
263 be defined in redis_servers.
265 GF/02 Catch and remove uninitialized value warning in exiqsumm
266 Check for existence of @ARGV before looking at $ARGV[0]
268 JH/01 Replace the store_release() internal interface with store_newblock(),
269 which internalises the check required to safely use the old one, plus
270 the allocate and data copy operations duplicated in both (!) of the
271 extant use locations.
273 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
274 modifier. This matches the restriction on the commandline.
276 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
277 Previously only the last row was returned.
279 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
280 we assumed that tags in the header were well-formed, and parsed the
281 element content after inspecting only the first char of the tag.
282 Assumptions at that stage could crash the receive process on malformed
285 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
286 While running the DKIM ACL we operate on the Permanent memory pool so that
287 variables created with "set" persist to the DATA ACL. Also (at any time)
288 DNS lookups that fail create cache records using the Permanent pool. But
289 expansions release any allocations made on the current pool - so a dnsdb
290 lookup expansion done in the DKIM ACL releases the memory used for the
291 DNS negative-cache, and bad things result. Solution is to switch to the
292 Main pool for expansions.
293 While we're in that code, add checks on the DNS cache during store_reset,
294 active in the testsuite.
295 Problem spotted, and debugging aided, by Wolfgang Breyha.
297 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
298 When none of the hosts presented to a transport match an already-open
299 connection, close it and proceed with the list. Previously we would
300 queue the message. Spotted by Lena with Yahoo, probably involving
303 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
304 Previously a spurious "250 OK id=" response was appended to the proper
307 JH/08 The "support for" informational output now, which built with Content
308 Scanning support, has a line for the malware scanner interfaces compiled
309 in. Interface can be individually included or not at build time.
311 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
312 by the template makefile "src/EDITME". The "STREAM" support for an older
313 ClamAV interface method is removed.
315 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
316 rows affected is given instead).
318 JH/11 The runtime Berkeley DB library version is now additionally output by
319 "exim -d -bV". Previously only the compile-time version was shown.
321 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
322 SMTP connection. Previously, when one had more receipients than the
323 first, an abortive onward connection was made. Move to full support for
324 multiple onward connections in sequence, handling cutthrough connection
325 for all multi-message initiating connections.
327 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
328 routers. Previously, a multi-recipient message would fail to match the
329 onward-connection opened for the first recipient, and cause its closure.
331 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
332 a timeout on read on a GnuTLS initiating connection, resulting in the
333 initiating connection being dropped. This mattered most when the callout
334 was marked defer_ok. Fix to keep the two timeout-detection methods
337 JH/15 Relax results from ACL control request to enable cutthrough, in
338 unsupported situations, from error to silently (except under debug)
339 ignoring. This covers use with PRDR, frozen messages, queue-only and
342 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
344 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
345 metadata, resulting in a crash in free().
347 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
348 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
349 Broken also in d185889f4, with init system revamp.
351 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
352 Previously we abruptly closed the connection after reading a malware-
353 found indication; now we go on to read the "scan ok" response line,
356 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
357 ACL. Previously, a crash would result.
359 JH/19 Speed up macro lookups during configuration file read, by skipping non-
360 macro text after a replacement (previously it was only once per line) and
361 by skipping builtin macros when searching for an uppercase lead character.
363 JH/20 DANE support moved from Experimental to mainline. The Makefile control
364 for the build is renamed.
366 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
367 was allocated for every new TLS startup, meaning one per message. Fix
368 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
370 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
371 reported the original. Fix to report (as far as possible) the ACL
372 result replacing the original.
374 JH/23 Fix memory leak during multi-message connections using STARTTLS under
375 OpenSSL. Certificate information is loaded for every new TLS startup,
376 and the resources needed to be freed.
378 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
380 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
383 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
384 DATA response info to the (existing) per-recipient response info for
385 the "C=" log element. It can have useful tracking info from the
386 destination system. Patch from Simon Arlott.
388 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
389 length value. Previously this would segfault.
391 HS/02 Support Avast multiline protoocol, this allows passing flags to
392 newer versions of the scanner.
394 JH/28 Ensure that variables possibly set during message acceptance are marked
395 dead before release of memory in the daemon loop. This stops complaints
396 about them when the debug_store option is enabled. Discovered specifically
397 for sender_rate_period, but applies to a whole set of variables.
398 Do the same for the queue-runner and queue-list loops, for variables set
399 from spool message files. Do the same for the SMTP per-message loop, for
400 certain variables indirectly set in ACL operations.
402 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
403 as a multi-recipient message from a mailinglist manager). The coding had
404 an arbitrary cutoff number of characters while checking for more input;
405 enforced by writing a NUL into the buffer. This corrupted long / fast
406 input. The problem was exposed more widely when more pipelineing of SMTP
407 responses was introduced, and one Exim system was feeding another.
408 The symptom is log complaints of SMTP syntax error (NUL chars) on the
409 receiving system, and refused recipients seen by the sending system
410 (propating to people being dropped from mailing lists).
411 Discovered and pinpointed by David Carter.
413 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
414 replaced by the ${authresults } expansion.
416 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
418 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
419 allows proper process termination in container environments.
421 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
422 Previously the "final dot" had a newline after it; ensure it is CR,LF.
424 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
425 and "err_perm", deprecated since 4.83 when the RFC-defined words
426 "temperror" and "permerror" were introduced.
428 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
429 transport-filters or DKIM-signing. The restriction was lost in the
430 consolidation of verify-callout and delivery SMTP handling.
431 Extend the restriction to also cover ARC-signing.
433 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
434 in defer=pass mode supply a 450 to the initiator. Previously the message
437 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
438 tls_require_ciphers is used as before.
440 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
441 "pass_unscanned". Only tmpfails from the scanner are written to
442 the paniclog, as they may require admin intervention (permission
443 denied, license issues). Other scanner errors (like decompression
444 bombs) do not cause a paniclog entry.
446 JH/36 Fix reinitialisation of DKIM logging variable between messages.
447 Previously it was possible to log spurious information in receive log
450 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
451 triggered odd behaviour from Outlook Express clients.
453 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
456 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
457 since the IETF WG has not yet settled on that versus the original
458 "bare" representation.
460 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
461 Previously the millisecond value corrupted the output.
462 Fix also for syslog_pid=no and log_selector +pid, for which the pid
463 corrupted the output.
469 JH/01 Rework error string handling in TLS interface so that the caller in
470 more cases is responsible for logging. This permits library-sourced
471 string to be attached to addresses during delivery, and collapses
472 pairs of long lines into single ones.
474 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
475 during configuration. Wildcards are allowed and expanded.
477 JH/02 Rework error string handling in DKIM to pass more info back to callers.
478 This permits better logging.
480 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
481 do not close it down and have the child transport start it up again on
482 the passed-on TCP connection. Instead, proxy the child (and any
483 subsequent ones) for TLS via a unix-domain socket channel. Logging is
484 affected: the continued delivery log lines do not have any DNSSEC, TLS
485 Certificate or OCSP information. TLS cipher information is still logged.
487 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
488 identical IP addresses on different listening ports. Will also affect
491 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
492 add noisy ifdef guards to special-case this sillyness.
493 Patch from Bernd Kuhls.
495 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
496 than 255 are no longer allowed.
498 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
499 Disable the session-cache too, which might reduce our load. Since we
500 currrectly use a new context for every connection, both as server and
501 client, there is no benefit for these.
502 GnuTLS appears to not support tickets server-side by default (we don't
503 call gnutls_session_ticket_enable_server()) but client side is enabled
504 by default on recent versions (3.1.3 +) unless the PFS priority string
507 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
508 <https://reproducible-builds.org/specs/source-date-epoch/>.
510 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
511 the check for any unsuccessful recipients did not notice the limit, and
512 erroneously found still-pending ones.
514 JH/08 Pipeline CHUNKING command and data together, on kernels that support
515 MSG_MORE. Only in-clear (not on TLS connections).
517 JH/09 Avoid using a temporary file during transport using dkim. Unless a
518 transport-filter is involved we can buffer the headers in memory for
519 creating the signature, and read the spool data file once for the
520 signature and again for transmission.
522 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
523 4.77 as the kernel support then wasn't solid, having issues in 64bit
524 mode. Now, it's been long enough. Add support for FreeBSD also.
526 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
527 case where the routing stage had gathered several addresses to send to
528 a host before calling the transport for the first, we previously failed
529 to close down TLS in the old transport process before passing the TCP
530 connection to the new process. The new one sent a STARTTLS command
531 which naturally failed, giving a failed delivery and bloating the retry
532 database. Investigation and fix prototype from Wolfgang Breyha.
534 JH/12 Fix check on SMTP command input synchronisation. Previously there were
535 false-negatives in the check that the sender had not preempted a response
536 or prompt from Exim (running as a server), due to that code's lack of
537 awareness of the SMTP input buffering.
539 PP/04 Add commandline_checks_require_admin option.
540 Exim drops privileges sanely, various checks such as -be aren't a
541 security problem, as long as you trust local users with access to their
542 own account. When invoked by services which pass untrusted data to
543 Exim, this might be an issue. Set this option in main configuration
544 AND make fixes to the calling application, such as using `--` to stop
547 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
548 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
549 responses to those, into a single TLS record each way (this usually means
550 a single packet). As a side issue, smtp_enforce_sync now works on TLS
553 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
554 affects you only if you're dancing at the edge of the param size limits.
555 If you are, and this message makes sense to you, then: raise the
556 configured limit or use OpenSSL 1.1. Nothing we can do for older
559 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
560 cmdline element to get the documented default one. Previously it was
563 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
564 are unsuable for non-message-specific reasons - eg. connection timeout,
565 banner-time rejection.
567 JH/16 Fix logging of delivery remote port, when specified by router, under
570 PP/06 Repair manualroute's ability to take options in any order, even if one
571 is the name of a transport.
574 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
576 JH/17 Change the list-building routines interface to use the expanding-string
577 triplet model, for better allocation and copying behaviour.
579 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
580 Previously it was constructed the first time a possibly-matching string
581 was met in the configuration file input during startup; now it is done
584 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
585 compatible one, to avoid the (poorly documented) possibility of a config
586 file in the working directory redirecting the DB files, possibly correpting
587 some existing file. CVE-2017-10140 assigned for BDB.
589 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
590 cache-hot. Previously, although the result was properly cached, the
591 initial verify call returned a defer.
593 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
594 the main verify for receipient in uncached-mode.
596 JH/22 Retire historical build files to an "unsupported" subdir. These are
597 defined as "ones for which we have no current evidence of testing".
599 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
600 if present. Previously it was ignored.
602 JH/24 Start using specified-initialisers in C structure init coding. This is
603 a C99 feature (it's 2017, so now considered safe).
605 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
606 if was a fixed-sized field and bitmask ops via macros; it is now more
609 PP/07 GitHub PR 56: Apply MariaDB build fix.
610 Patch provided by Jaroslav Škarvada.
612 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
613 during Coverity cleanups [4.87 JH/47]
614 Diagnosis and fix provided by Michael Fischer v. Mollard.
616 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
617 the right size to place the terminating semicolon on its own folded
618 line, the header hash was calculated to an incorrect value thanks to
619 the (relaxed) space the fold became.
621 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
622 and confused the parent.
624 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
625 which could crash as a result. This could lead to undeliverable messages.
627 JH/28 Logging: "next input sent too soon" now shows where input was truncated
630 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
631 matters on fast-turnover and PID-randomising systems, which were getting
632 out-of-order delivery.
634 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
635 a possibly-overlapping copy. The symptom was that "Remote host closed
636 connection in response to HELO" was logged instead of the actual 4xx
639 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
640 Previously only that bufferd was discarded, resulting in SYMTP command
643 JH/32 DKIM: when a message has multiple signatures matching an identity given
644 in dkim_verify_signers, run the dkim acl once for each. Previously only
645 one run was done. Bug 2189.
647 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
648 "panic the current process" to "deliberately defer". The panic log is
649 still written with the problem list name; the mail and reject logs now
650 get a temp-reject line for the message that was being handled, saying
651 something like "domains check lookup or other defer". The SMTP 451
652 message is still "Temporary local problem".
654 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
655 A crafted sequence of BDAT commands could result in in-use memory beeing
656 freed. CVE-2017-16943.
658 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
659 from SMTP input. Previously it was always done; now only done for DATA
660 and not BDAT commands. CVE-2017-16944.
662 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
663 to the message (such as an overlong header line). Previously this was
664 not done and we did not exit BDAT mode. Followon from the previous item
665 though a different problem.
671 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
672 than -2003 did; needs libidn2 in addition to libidn.
674 JH/02 The path option on a pipe transport is now expanded before use.
676 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
677 Patch provided by "Björn", documentation fix added too.
679 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
680 missing a wire-to-host endian conversion.
682 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
683 close after a BDAT command line could be taken as a following command,
684 giving a synch failure. Fix by only checking for synch immediately
685 before acknowledging the chunk.
687 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
688 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
689 macro. Patches provided by Josh Soref.
691 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
692 Previously we did not; the RFC seems ambiguous and VRFY is not listed
693 by IANA as a service extension. However, John Klensin suggests that we
696 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
697 the dkim code may be unix-mode line endings rather than smtp wire-format
698 CRLF, so prepend a CR to any bare LF.
700 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
701 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
703 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
704 the first were themselves being wrongly included in the feed into dkim
705 processing; with most chunk sizes in use this resulted in an incorrect
706 body hash calculated value.
708 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
709 DKIM signature block, for verification. Although advised against by
710 standards it is specifically not ruled illegal.
712 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
714 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
715 missing a body hash (the bh= tag).
717 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
718 It seems that HAProxy sends the Proxy Protocol information in clear and
719 only then does a TLS startup, so do the same.
721 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
722 TCP connections (such as for Spamd) unless the daemon successfully set
723 Fast Open mode on its listening sockets. This fixes breakage seen on
724 too-old kernels or those not configured for Fast Open, at the cost of
725 requiring both directions being enabled for TFO, and TFO never being used
726 by non-daemon-related Exim processes.
728 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
729 endings, at least on the first header line. Try to canonify any that get
730 past that check, despite the cost.
732 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
733 now limited to an arbitrary five deep, while parsing addresses with the
734 strip_excess_angle_brackets option enabled.
736 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
737 instead leave the unprompted TLS handshake in socket buffer for the
738 TLS library to consume.
740 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
742 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
744 JH/16 Drop variables when they go out of scope. Memory management drops a whole
745 region in one operation, for speed, and this leaves assigned pointers
746 dangling. Add checks run only under the testsuite which checks all
747 variables at a store-reset and panics on a dangling pointer; add code
748 explicitly nulling out all the variables discovered. Fixes one known
749 bug: a transport crash, where a dangling pointer for $sending_ip_address
750 originally assigned in a verify callout, is re-used.
752 PP/06 Drop '.' from @INC in various Perl scripts.
754 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
756 PP/08 Reduce a number of compilation warnings under clang; building with
757 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
758 should be warning-free.
760 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
762 HS/01 Fix portability problems introduced by PP/08 for platforms where
763 realloc(NULL) is not equivalent to malloc() [SunOS et al].
765 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
766 chunk. This allows us to accept broken chunked messages. We need a more
767 general solution here.
769 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
770 already-broken messages in the queue.
772 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
774 JH/19 Fix reference counting bug in routing-generated-address tracking.
780 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
781 supports it and a size is available (ie. the sending peer gave us one).
783 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
784 years of being deprecated). The replacements are the ACLs
785 acl_smtp_mime and acl_not_smtp_mime.
787 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
788 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
789 or even an in-clear connection were permitted. Now, if the host lookup
790 was dnssec and dane was requested then the host is only used if the
791 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
792 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
793 if one fails this test.
794 This means that a poorly-configured remote DNS will make it incommunicado;
795 but it protects against a DNS-interception attack on it.
797 JH/04 Bug 1810: make continued-use of an open smtp transport connection
798 non-noisy when a race steals the message being considered.
800 JH/05 If main configuration option tls_certificate is unset, generate a
801 self-signed certificate for inbound TLS connections.
803 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
804 in rewrites and routers.
806 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
807 and logged a warning sing 4.83; now they are a configuration file error.
809 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
810 (lacking @domain). Apply the same qualification processing as RCPT.
812 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
814 JH/10 Support ${sha256:} applied to a string (as well as the previous
817 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
818 a cutthrough deliver is pending, as we always want to make a connection.
819 This also avoids re-routing the message when later placing the cutthrough
820 connection after a verify cache hit.
821 Do not update it with the verify result either.
823 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
824 when routing results in more than one destination address.
826 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
827 signing (which inhibits the cutthrough capability). Previously only
828 the presence of an option was tested; now an expansion evaluating as
829 empty is permissible (obviously it should depend only on data available
830 when the cutthrough connection is made).
832 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
833 the relevant preceding SMTP command did not note the pipelining mode.
835 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
836 Previously they were not counted.
838 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
839 as one having no matching records. Previously we deferred the message
840 that needed the lookup.
842 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
843 distinguished as "(=".
845 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
846 for missing MX records. Previously it only worked for missing A records.
848 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
850 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
851 after the data-go-ahead and data-ack. Patch from Jason Betts.
853 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
854 even for a "none" policy. Patch from Tony Meyer.
856 JH/22 Fix continued use of a connection for further deliveries. If a port was
857 specified by a router, it must also match for the delivery to be
860 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
861 When one of the recipients of a message was unsuitable for the connection
862 (has no matching addresses), we lost track of needing to mark it
863 deferred. As a result mail would be lost.
865 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
867 JH/25 Decoding ACL controls is now done using a binary search; the source code
868 takes up less space and should be simpler to maintain. Merge the ACL
869 condition decode tables also, with similar effect.
871 JH/26 Fix problem with one_time used on a redirect router which returned the
872 parent address unchanged. A retry would see the parent address marked as
873 delivered, so not attempt the (identical) child. As a result mail would
876 JH/27 Fix a possible security hole, wherein a process operating with the Exim
877 UID can gain a root shell. Credit to http://www.halfdog.net/ for
878 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
881 JH/28 Enable {spool,log} filesystem space and inode checks as default.
882 Main config options check_{log,spool}_{inodes,space} are now
883 100 inodes, 10MB unless set otherwise in the configuration.
885 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
886 Previously it only applied to the main-section connection policy
889 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
891 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
892 by me. Added RFC7919 DH primes as an alternative.
894 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
895 are not in the system include path.
897 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
898 GnuTLS, when a session startup failed (eg because the client disconnected)
899 Exim did stdio operations after fclose. This was exposed by a recent
900 change which nulled out the file handle after the fclose.
902 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
903 signed directly by the cert-signing cert, rather than an intermediate
904 OCSP-signing cert. This is the model used by LetsEncrypt.
906 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
908 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
909 an incoming connection.
911 HS/02 Bug 1802: Do not half-close the connection after sending a request
914 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
915 fallback to "prime256v1".
917 JH/34 SECURITY: Use proper copy of DATA command in error message.
918 Could leak key material. Remotely exploitable. CVE-2016-9963.
924 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
925 and 3.4.4 - once the server is enabled to respond to an OCSP request
926 it does even when not requested, resulting in a stapling non-aware
927 client dropping the TLS connection.
929 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
930 support variable-length bit vectors. No functional change.
932 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
933 The I= interface field on outgoing lines is now after the H= remote
934 host field, same as incoming lines. There is a separate
935 outgoing_interface log selector which allows you to disable the
938 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
939 If not running log_selector +smtp_connection the mainlog would be held
940 open indefinitely after a "too many connections" event, including to a
941 deleted file after a log rotate. Leave the per net connection logging
942 leaving it open for efficiency as that will be quickly detected by the
943 check on the next write.
945 HS/01 Bug 1671: Fix post transport crash.
946 Processing the wait-<transport> messages could crash the delivery
947 process if the message IDs didn't exist for some reason. When
948 using 'split_spool_directory=yes' the construction of the spool
949 file name failed already, exposing the same netto behaviour.
951 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
952 mime_regex ACL conditions.
954 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
955 to DSN fail messages (bounces): remote IP, remote greeting, remote response
956 to HELO, local diagnostic string.
958 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
959 log line to debug. Even when configured with a tls authenticator many
960 client connections are expected to not authenticate in this way, so
961 an authenticate fail is not an error.
963 HS/02 Add the Exim version string to the process info. This way exiwhat
964 gives some more detail about the running daemon.
966 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
967 matter for fast-change records such as DNSBLs.
969 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
970 retry record, even if constant. There may be multiple transports with
971 different interface settings and the retry behaviour needs to be kept
974 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
976 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
978 JH/10 Bug 840: fix log_defer_output option of pipe transport
980 JH/11 Bug 830: use same host for all RCPTS of a message, even under
981 hosts_randomize. This matters a lot when combined with mua_wrapper.
983 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
984 ${quote_pgsql:<string>} operator.
986 JH/13 Bug 1708: avoid misaligned access in cached lookup.
988 JH/14 Change header file name for freeradius-client. Relevant if compiling
989 with Radius support; from the Gentoo tree and checked under Fedora.
991 JH/15 Bug 1712: Introduce $prdr_requested flag variable
993 JH/16 Bug 1714: Permit an empty string as expansion result for transport
994 option transport_filter, meaning no filtering.
996 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
998 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
999 defaults to "*" (all hosts). The variable is now available when not built
1000 with TLS, default unset, mainly to enable keeping the testsuite sane.
1001 If a server certificate is not supplied (via tls_certificate) an error is
1002 logged, and clients will find TLS connections fail on startup. Presumably
1003 they will retry in-clear.
1004 Packagers of Exim are strongly encouraged to create a server certificate
1005 at installation time.
1007 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1008 with the $config_file variable.
1010 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1011 in transport context, after the attempt, and per-recipient. The latter type
1012 is per host attempted. The event data is the error message, and the errno
1013 information encodes the lookup type (A vs. MX) used for the (first) host,
1014 and the trailing two digits of the smtp 4xx response.
1016 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1017 to write to mainlog (or rejectlog, paniclog) in the window between file
1018 creation and permissions/ownership being changed. Particularly affects
1019 installations where exicyclog is run as root, rather than exim user;
1020 result is that the running daemon panics and dies.
1022 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1024 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1025 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1026 "pri" and "weight". Note that the previous implicit priority given by the
1027 list order is no longer honoured.
1029 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1030 for DKIM processing.
1032 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1033 by defining SUPPORT_SOCKS.
1035 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1036 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1037 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1038 variables are renamed to proxy_{local,external}_{address,port}.
1040 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1041 for a build by defining SUPPORT_I18N
1043 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1044 of the query string, and make ${quote_redis:} do that quoting.
1046 JH/29 Move Events support from Experimental to mainline, enabled by default
1047 and removable for a build by defining DISABLE_EVENT.
1049 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1051 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1052 cached by the daemon.
1054 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1055 by defining LOOKUP_REDIS. The libhiredis library is required.
1057 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1058 keys are given for lookup.
1060 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1061 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1062 only supported when built with TLS support. The PolarSSL SHA routines
1063 are still used when the TLS library is too old for convenient support.
1065 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1066 openssl_options), for security. OpenSSL forces this from version 1.1.0
1067 server-side so match that on older versions.
1069 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1070 allocation for $value could be released as the expansion processing
1071 concluded, but leaving the global pointer active for it.
1073 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1074 and to use the domains and local_parts ACL conditions.
1076 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1077 incorrectly not doubled on cutthrough transmission, hence seen as a
1078 body-termination at the receiving system - resulting in truncated mails.
1079 Commonly the sender saw a TCP-level error, and retransmitted the message
1080 via the normal store-and-forward channel. This could result in duplicates
1081 received - but deduplicating mailstores were liable to retain only the
1082 initial truncated version.
1084 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1086 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1088 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1089 we're in there, support oversigning also; bug 1309.
1091 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1093 HS/04 Add support for keep_environment and add_environment options.
1095 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1096 either intentional arithmetic overflow during PRNG, or testing config-
1099 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1100 delivery resulted in actual delivery. Cancel cutthrough before DATA
1103 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1104 rejects a recipient: pass the reject to the originator.
1106 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1107 Many were false-positives and ignorable, but it's worth fixing the
1110 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1111 for the new environment-manipulation done at startup. Move the routines
1112 from being local to tls.c to being global via the os.c file.
1114 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1115 an extract embedded as result-arg for a map, the first arg for extract
1116 is unavailable so we cannot tell if this is a numbered or keyed
1117 extraction. Accept either.
1123 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1126 JH/02 The smtp transport option "multi_domain" is now expanded.
1128 JH/03 The smtp transport now requests PRDR by default, if the server offers
1131 JH/04 Certificate name checking on server certificates, when exim is a client,
1132 is now done by default. The transport option tls_verify_cert_hostnames
1133 can be used to disable this per-host. The build option
1134 EXPERIMENTAL_CERTNAMES is withdrawn.
1136 JH/05 The value of the tls_verify_certificates smtp transport and main options
1137 default to the word "system" to access the system default CA bundle.
1138 For GnuTLS, only version 3.0.20 or later.
1140 JH/06 Verification of the server certificate for a TLS connection is now tried
1141 (but not required) by default. The verification status is now logged by
1142 default, for both outbound TLS and client-certificate supplying inbound
1145 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1148 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1149 Status Notification (bounce) messages are now MIME format per RFC 3464.
1150 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1151 under the control of the dsn_advertise_hosts option, and routers may
1152 have a dsn_lasthop option.
1154 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1155 default, modifiable by a malware= option. The list separator for
1156 the options can now be changed in the usual way. Bug 68.
1158 JH/10 The smtp_receive_timeout main option is now expanded before use.
1160 JH/11 The incoming_interface log option now also enables logging of the
1161 local interface on delivery outgoing connections.
1163 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1164 if the interface and destination host and port all match.
1166 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1169 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1170 Patch from Andrew Lewis.
1172 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1173 now supports optional time-restrictions, weighting, and priority
1174 modifiers per server. Patch originally by <rommer@active.by>.
1176 JH/16 The spamd_address main option now supports a mixed list of local
1177 and remote servers. Remote servers can be IPv6 addresses, and
1178 specify a port-range.
1180 JH/17 Bug 68: The spamd_address main option now supports an optional
1181 timeout value per server.
1183 JH/18 Bug 1581: Router and transport options headers_add/remove can
1184 now have the list separator specified.
1186 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1189 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1192 JH/21 Support for the A6 type of dns record is withdrawn.
1194 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1195 rather than the verbs used.
1197 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1198 from 255 to 1024 chars.
1200 JH/24 Verification callouts now attempt to use TLS by default.
1202 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1203 are generic router options now. The defaults didn't change.
1205 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1206 Original patch from Alexander Shikoff, worked over by JH.
1208 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1209 files if ZCAT_COMMAND is not executable.
1211 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1213 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1215 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1216 Normally benign, it bites when the pair was led to by a CNAME;
1217 modern usage is to not canonicalize the domain to a CNAME target
1218 (and we were inconsistent anyway for A-only vs AAAA+A).
1220 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1222 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1223 when evaluating $sender_host_dnssec.
1225 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1226 $sender_helo_dnssec variable.
1228 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1230 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1232 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1234 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1235 documented as working, but never had. Support all but $spam_report.
1237 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1238 added for tls authenticator.
1240 HS/03 Add perl_taintmode main config option
1246 TL/01 When running the test suite, the README says that variables such as
1247 no_msglog_check are global and can be placed anywhere in a specific
1248 test's script, however it was observed that placement needed to be near
1249 the beginning for it to behave that way. Changed the runtest perl
1250 script to read through the entire script once to detect and set these
1251 variables, reset to the beginning of the script, and then run through
1252 the script parsing/test process like normal.
1254 TL/02 The BSD's have an arc4random API. One of the functions to induce
1255 adding randomness was arc4random_stir(), but it has been removed in
1256 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1257 function when detected.
1259 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1260 cause callback expansion.
1262 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1263 syntax errors in an expansion can be treated as a string instead of
1264 logging or causing an error, due to the internal use of bool_lax
1265 instead of bool when processing it.
1267 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1268 server certificates when making smtp deliveries.
1270 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1272 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1274 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1276 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1277 Merged patch from Sebastian Wiedenroth.
1279 JH/05 Fix results-pipe from transport process. Several recipients, combined
1280 with certificate use, exposed issues where response data items split
1281 over buffer boundaries were not parsed properly. This eventually
1282 resulted in duplicates being sent. This issue only became common enough
1283 to notice due to the introduction of connection certificate information,
1284 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1286 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1287 size buffer was used, resulting in syntax errors when an expansion
1290 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1291 version 3.3.6 or later.
1293 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1294 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1295 both become "event_action", the variables become $event_name, $event_data
1296 and $event_defer_errno. There is a new variable $verify_mode, usable in
1297 routers, transports and related events. The tls:cert event is now also
1298 raised for inbound connections, if the main configuration event_action
1301 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1302 early OCSP support, but no stapling (appears to be less than 1.0.0).
1304 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1305 server certificate names available under the smtp transport option
1306 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1309 JH/10 Time-related extraction expansions from certificates now use the main
1310 option "timezone" setting for output formatting, and are consistent
1311 between OpenSSL and GnuTLS compilations. Bug 1541.
1313 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1314 encoded parameter in the incoming message. Bug 1558.
1316 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1317 include certificate info, eximon was claiming there were spoolfile
1320 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1322 JH/14 Log delivery-related information more consistently, using the sequence
1323 "H=<name> [<ip>]" wherever possible.
1325 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1326 are problematic for Debian distribution, omit them from the release
1329 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1331 JH/16 Fix string representation of time values on 64bit time_t architectures.
1334 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1335 output list separator was used.
1340 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1341 checkers that were complaining about end of non-void function with no
1344 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1345 This was a regression introduced in 4.83 by another bugfix.
1347 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1349 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1350 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1356 TF/01 Correctly close the server side of TLS when forking for delivery.
1358 When a message was received over SMTP with TLS, Exim failed to clear up
1359 the incoming connection properly after forking off the child process to
1360 deliver the message. In some situations the subsequent outgoing
1361 delivery connection happened to have the same fd number as the incoming
1362 connection previously had. Exim would try to use TLS and fail, logging
1363 a "Bad file descriptor" error.
1365 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1366 utilities have not been installed.
1368 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1369 temporary space as the ACL may create new global variables.
1371 TL/01 LDAP support uses per connection or global context settings, depending
1372 upon the detected version of the libraries at build time.
1374 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1375 to extract and use the src ip:port in logging and expansions as if it
1376 were a direct connection from the outside internet. PPv2 support was
1377 updated based on HAProxy spec change in May 2014.
1379 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1381 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1382 Properly escape header and check for NULL return.
1384 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1387 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1389 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1390 characters in header names, implemented as a verify condition.
1391 Contributed by Michael Fischer v. Mollard.
1393 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1394 results permerror and temperror. Previous values are deprecated but
1395 still accepted. In a future release, err_perm and err_temp will be
1396 completely removed, which will be a backward incompatibility if the
1397 ACL tests for either of these two old results. Patch contributed by
1398 user bes-internal on the mailing list.
1400 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1402 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1403 selectors, in both main and reject logs.
1405 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1408 JH/07 Add malware type "sock" for talking to simple daemon.
1410 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1412 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1413 routers/transports under cutthrough routing.
1415 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1416 numbers. Touch up "bool" conditional to keep the same definition.
1418 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1420 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1422 JH/12 Expand items in router/transport headers_add or headers_remove lists
1423 individually rather than the list as a whole. Bug 1452.
1425 Required for reasonable handling of multiple headers_ options when
1426 they may be empty; requires that headers_remove items with embedded
1427 colons must have them doubled (or the list-separator changed).
1429 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1430 view the policy declared in the DMARC record. Currently, $dmarc_status
1431 is a combined value of both the record presence and the result of the
1434 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1436 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1437 dnslookup router and the smtp transport (applying to the forward
1440 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1441 of ldap servers used for a specific lookup. Patch provided by Heiko
1444 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1445 New variable $lookup_dnssec_authenticated for observability.
1447 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1448 Patch submitted by Lars Timman.
1450 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1452 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1453 Requires trusted mode and valid format message id, aborts otherwise.
1454 Patch contributed by Heiko Schlichting.
1456 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1457 certextract with support for various fields. Bug 1358.
1459 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1460 is requested by default, modifiable by smtp transport option
1463 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1464 operate on certificate variables to give certificate fingerprints
1465 Also new ${sha256:cert_variable}.
1467 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1469 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1470 Christian Aistleitner.
1472 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1474 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1475 file. Patch from Wolfgang Breyha.
1477 JH/25 Expand the coverage of the delivery $host and $host_address to
1478 client authenticators run in verify callout. Bug 1476.
1480 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1481 align with daemon_smtp_ports. Bug 72.
1483 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1484 support and error reporting did not work properly.
1486 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1487 and is readable. Patch from Andrew Colin Kissa.
1489 TL/14 Enhance documentation of ${run expansion and how it parses the
1490 commandline after expansion, particularly in the case when an
1491 unquoted variable expansion results in an empty value.
1493 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1495 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1496 by renaming away from it. Addresses GH issue 15, reported by
1499 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1501 TL/15 SECURITY: prevent double expansion in math comparison functions
1502 (can expand unsanitized data). Not remotely exploitable.
1509 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1511 PP/02 Make -n do something, by making it not do something.
1512 When combined with -bP, the name of an option is not output.
1514 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1517 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1518 $sender_host_name and config options to manage this, and basic check
1521 PP/05 DSCP support for outbound connections and control modifier for inbound.
1523 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1524 (Only plugin which currently uses this is kerberos4, which nobody should
1525 be using, but we should make it available and other future plugins might
1526 conceivably use it, even though it would break NAT; stuff *should* be
1527 using channel bindings instead).
1529 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1530 name; added for Sendmail compatibility; requires admin caller.
1531 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1532 just ignore it); requires trusted caller.
1533 Also parse but ignore: -Ac -Am -X<logfile>
1536 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1538 TL/02 Add +smtp_confirmation as a default logging option.
1540 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1541 Patch by Magnus Holmgren from 2007-02-20.
1543 TL/04 Bugzilla 1281 - Spec typo.
1544 Bugzilla 1283 - Spec typo.
1545 Bugzilla 1290 - Spec grammar fixes.
1547 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1549 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1551 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1552 mailing list by by Dmitry Isaikin.
1554 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1556 JH/02 Support "G" suffix to numbers in ${if comparisons.
1558 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1560 NM/01 Bugzilla 1197 - Spec typo
1561 Bugzilla 1196 - Spec examples corrections
1563 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1565 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1566 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1569 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1570 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1572 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1573 "acl {{name}{arg}...}", and optional args on acl condition
1576 JH/05 Permit multiple router/transport headers_add/remove lines.
1578 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1580 JH/07 Avoid using a waiting database for a single-message-only transport.
1581 Performance patch from Paul Fisher. Bugzilla 1262.
1583 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1586 JH/09 Add $headers_added variable, with content from use of ACL modifier
1587 add_header (but not yet added to the message). Bugzilla 199.
1589 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1590 Pulled from Bugzilla 817 by Wolfgang Breyha.
1592 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1594 (nb: this is the same fix as in Exim 4.80.1)
1596 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1599 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1602 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1604 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1605 advertise SMTP AUTH mechanism to us, instead of a generic
1606 protocol violation error. Also, make Exim more robust to bad
1607 data from the Dovecot auth socket.
1609 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1611 When a queue runner is handling a message, Exim first routes the
1612 recipient addresses, during which it prunes them based on the retry
1613 hints database. After that it attempts to deliver the message to
1614 any remaining recipients. It then updates the hints database using
1617 So if a recipient address works intermittently, it can get repeatedly
1618 deferred at routing time. The retry hints record remains fresh so the
1619 address never reaches the final cutoff time.
1621 This is a fairly common occurrence when a user is bumping up against
1622 their storage quota. Exim had some logic in its local delivery code
1623 to deal with this. However it did not apply to per-recipient defers
1624 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1626 This change adds a proper retry rule check during routing so that the
1627 final cutoff time is checked against the message's age. We only do
1628 this check if there is an address retry record and there is not a
1629 domain retry record; this implies that previous attempts to handle
1630 the address had the retry_use_local_parts option turned on. We use
1631 this as an approximation for the destination being like a local
1632 delivery, as in LMTP.
1634 I suspect this new check makes the old local delivery cutoff check
1635 redundant, but I have not verified this so I left the code in place.
1637 TF/02 Correct gecos expansion when From: is a prefix of the username.
1639 Test 0254 submits a message to Exim with the header
1643 When I ran the test suite under the user fanf2, Exim expanded
1644 the header to contain my full name, whereas it should have added
1645 a Resent-Sender: header. It erroneously treats any prefix of the
1646 username as equal to the username.
1648 This change corrects that bug.
1650 GF/01 DCC debug and logging tidyup
1651 Error conditions log to paniclog rather than rejectlog.
1652 Debug lines prefixed by "DCC: " to remove any ambiguity.
1654 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1656 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1657 Bug spotted by Jeremy Harris; was flawed since initial commit.
1658 Would have resulted in OCSP responses post-SNI triggering an Exim
1659 NULL dereference and crash.
1661 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1663 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1664 Bug detection, analysis and fix by Samuel Thibault.
1665 Bugzilla 1331, Debian bug #698092.
1667 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1669 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1670 Server implementation by Todd Lyons, client by JH.
1671 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1672 config variable "prdr_enable" controls whether the server
1673 advertises the facility. If the client requests PRDR a new
1674 acl_data_smtp_prdr ACL is called once for each recipient, after
1675 the body content is received and before the acl_smtp_data ACL.
1676 The client is controlled by both of: a hosts_try_prdr option
1677 on the smtp transport, and the server advertisement.
1678 Default client logging of deliveries and rejections involving
1679 PRDR are flagged with the string "PRDR".
1681 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1682 fclose(). Diagnosis by Todd Lyons.
1684 PP/17 Update configure.default to handle IPv6 localhost better.
1685 Patch by Alain Williams (plus minor tweaks).
1688 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1689 This is now consistent with GnuTLS, and is now documented: the
1690 previous undocumented portable approach to treating the option as
1691 unset was to force an expansion failure. That still works, and
1692 an empty string is now equivalent.
1694 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1695 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1696 not performing validation itself.
1698 PP/20 Added force_command boolean option to pipe transport.
1699 Patch from Nick Koston, of cPanel Inc.
1701 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1704 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1706 PP/21 Fix eximon continuous updating with timestamped log-files.
1707 Broken in a format-string cleanup in 4.80, missed when I repaired the
1708 other false fix of the same issue.
1709 Report and fix from Heiko Schlichting.
1712 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1713 Report from Prashanth Katuri.
1715 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1716 It's SecureTransport, so affects any MacOS clients which use the
1717 system-integrated TLS libraries, including email clients.
1719 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1720 using a MIME ACL for non-SMTP local injection.
1721 Report and assistance in diagnosis by Warren Baker.
1723 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1725 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1727 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1728 last id that failed so it may be referenced in subsequent ACL's.
1730 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1733 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1734 ldap library initialization, allowing self-signed CA's to be
1735 used. Also properly sets require_cert option later in code by
1736 using NULL (global ldap config) instead of ldap handle (per
1737 session). Bug diagnosis and testing by alxgomz.
1739 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1740 the src/util/ subdirectory.
1742 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1743 renamed to Transport Post Delivery Action by Jeremy Harris, as
1746 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1747 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1748 redis_servers = needs to be configured which will be used by the redis
1749 lookup. Patch from Warren Baker, of The Packet Hub.
1751 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1753 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1754 hostname or reverse DNS when processing a host list. Used suggestions
1755 from multiple comments on this bug.
1757 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1759 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1760 Missed a few lines, added it to make the runtest require no keyboard
1763 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1764 contains upper case chars. Make router use caseful_local_part.
1766 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1767 support when GnuTLS has been built with p11-kit.
1773 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1775 This, or similar/improved, will also be change PP/11 of 4.82.
1781 PP/01 Handle short writes when writing local log-files.
1782 In practice, only affects FreeBSD (8 onwards).
1783 Bugzilla 1053, with thanks to Dmitry Isaikin.
1785 NM/01 Bugzilla 949 - Documentation tweak
1787 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1790 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1792 PP/02 Implemented gsasl authenticator.
1794 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1796 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1797 `pkg-config foo` for cflags/libs.
1799 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1800 with rest of GSASL and with heimdal_gssapi.
1802 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1803 `pkg-config foo` for cflags/libs for the TLS implementation.
1805 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1806 properties get this fed in as external SSF. A number of robustness
1807 and debugging improvements to the cyrus_sasl authenticator.
1809 PP/08 cyrus_sasl server now expands the server_realm option.
1811 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1812 Patch by Jeremy Harris.
1814 PP/10 Added dbmjz lookup type.
1816 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1818 PP/12 MAIL args handles TAB as well as SP, for better interop with
1819 non-compliant senders.
1820 Analysis and variant patch by Todd Lyons.
1822 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1823 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1824 Patch from Dirk Mueller <dmueller@suse.com>
1826 PP/13 tls_peerdn now print-escaped for spool files.
1827 Observed some $tls_peerdn in wild which contained \n, which resulted
1828 in spool file corruption.
1830 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1831 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1832 or write after TLS renegotiation, which otherwise led to messages
1835 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1836 as a tracking header (ie: a signed header comes before the signature).
1837 Patch from Wolfgang Breyha.
1839 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1840 comma-sep list; embedded commas doubled.
1842 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1844 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1846 Report and patch from Dmitry Banschikov.
1848 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1849 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1850 failures. We appear to now support TLS1.1+ with Exim.
1852 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1853 lets Exim select keys and certificates based upon TLS SNI from client.
1854 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1855 before an outbound SMTP session. New log_selector, +tls_sni.
1857 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1858 NULL dereference. Report and patch from Alun Jones.
1860 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1861 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1862 Not seeing resolver debug output on NetBSD, but suspect this is a
1863 resolver implementation change.
1865 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1866 Left warnings. Added "eximon gdb" invocation mode.
1868 PP/21 Defaulting "accept_8bitmime" to true, not false.
1870 PP/22 Added -bw for inetd wait mode support.
1872 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1873 locate the relevant includes and libraries. Made this the default.
1875 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1876 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1878 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1879 This may cause build issues on older platforms.
1881 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1882 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1883 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1884 Added SNI support via GnuTLS too.
1885 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1887 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1889 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1890 Applied second patch from Janne, implementing suggestion to default
1891 multiple-strings-in-record handling to match SPF spec.
1893 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1895 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1896 read-only, out of scope).
1897 Patch from Wolfgang Breyha, report from Stuart Northfield.
1899 PP/29 Fix three issues highlighted by clang analyser static analysis.
1900 Only crash-plausible issue would require the Cambridge-specific
1901 iplookup router and a misconfiguration.
1902 Report from Marcin Mirosław.
1904 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1906 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1907 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1908 As part of this, removing so much warning spew let me fix some minor
1909 real issues in debug logging.
1911 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1912 assignment on my part. Fixed.
1914 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1915 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1916 Janne Snabb (who went above and beyond: thank you).
1918 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1919 string otherwise requires a connection and a bunch more work and it's
1920 relatively easy to get wrong. Should also expose TLS library linkage
1923 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1924 64-bit ${eval} (JH/03).
1926 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1927 GNU libc to support some of the 64-bit stuff, should not lead to
1928 conflicts. Defined before os.h is pulled in, so if a given platform
1929 needs to override this, it can.
1931 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1932 protection layer was required, which is not implemented.
1933 Bugzilla 1254, patch from Wolfgang Breyha.
1935 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1936 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1937 tls_dhparam take prime identifiers. Also unbreak combination of
1938 OpenSSL+DH_params+TLSSNI.
1940 PP/39 Disable SSLv2 by default in OpenSSL support.
1946 PP/01 Solaris build fix for Oracle's LDAP libraries.
1947 Bugzilla 1109, patch from Stephen Usher.
1949 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1951 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1954 TF/02 Fix a couple more cases where we did not log the error message
1955 when unlink() failed. See also change 4.74-TF/03.
1957 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1958 lock up or crash if it happened to be inside a call to libc when it
1959 got a SIGUSR1 from exiwhat.
1961 The SIGUSR1 handler appends the current process status to the process
1962 log which is later printed by exiwhat. It used to use the general
1963 purpose logging code to do this, but several functions it calls are
1964 not safe for signals.
1966 The new output code in the SIGUSR1 handler is specific to the process
1967 log, and simple enough that it's easy to inspect for signal safety.
1968 Removing some special cases also simplifies the general logging code.
1969 Removing the spurious timestamps from the process log simplifies
1972 TF/04 Improved ratelimit ACL condition.
1974 The /noupdate option has been deprecated in favour of /readonly which
1975 has clearer semantics. The /leaky, /strict, and /readonly update modes
1976 are mutually exclusive. The update mode is no longer included in the
1977 database key; it just determines when the database is updated. (This
1978 means that when you upgrade Exim will forget old rate measurements.)
1980 Exim now checks that the per_* options are used with an update mode that
1981 makes sense for the current ACL. For example, when Exim is processing a
1982 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1983 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1984 must specify per_mail/readonly. If you omit the update mode it defaults to
1985 /leaky where that makes sense (as before) or /readonly where required.
1987 The /noupdate option is now undocumented but still supported for
1988 backwards compatibility. It is equivalent to /readonly except that in
1989 ACLs where /readonly is required you may specify /leaky/noupdate or
1990 /strict/noupdate which are treated the same as /readonly.
1992 A useful new feature is the /count= option. This is a generalization
1993 of the per_byte option, so that you can measure the throughput of other
1994 aggregate values. For example, the per_byte option is now equivalent
1995 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1997 The per_rcpt option has been generalized using the /count= mechanism
1998 (though it's more complicated than the per_byte equivalence). When it is
1999 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2000 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2001 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2002 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2003 Note that using per_rcpt with a non-readonly update mode in more than
2004 one ACL will cause the recipients to be double-counted. (The per_mail
2005 and per_byte options don't have this problem.)
2007 The handling of very low rates has changed slightly. If the computed rate
2008 is less than the event's count (usually one) then this event is the first
2009 after a long gap. In this case the rate is set to the same as this event's
2010 count, so that the first message of a spam run is counted properly.
2012 The major new feature is a mechanism for counting the rate of unique
2013 events. The new per_addr option counts the number of different
2014 recipients that someone has sent messages to in the last time period. It
2015 behaves like per_rcpt if all the recipient addresses are different, but
2016 duplicate recipient addresses do not increase the measured rate. Like
2017 the /count= option this is a general mechanism, so the per_addr option
2018 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2019 example, measure the rate that a client uses different sender addresses
2020 with the options per_mail/unique=$sender_address. There are further
2021 details in the main documentation.
2023 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2025 TF/06 Removed a few PCRE remnants.
2027 TF/07 Automatically extract Exim's version number from tags in the git
2028 repository when doing development or release builds.
2030 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2031 Bugzilla 879. Patch from Paul Fisher.
2033 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2034 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2037 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2039 PP/05 Variable $av_failed, true if the AV scanner deferred.
2040 Bugzilla 1078. Patch from John Horne.
2042 PP/06 Stop make process more reliably on build failure.
2043 Bugzilla 1087. Patch from Heiko Schlittermann.
2045 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2046 Bugzilla 1089. Patch from Heiko Schlittermann.
2048 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2049 Bugzilla 1131. Patch from Holger Weiß.
2051 PP/09 Handle IPv6 addresses with SPF.
2052 Bugzilla 860. Patch from Wolfgang Breyha.
2054 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2056 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2059 PP/11 match_* no longer expand right-hand-side by default.
2060 New compile-time build option, EXPAND_LISTMATCH_RHS.
2061 New expansion conditions, "inlist", "inlisti".
2063 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2065 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2067 PP/14 fix log_write() format string regression from TF/03.
2068 Bugzilla 1152. Patch from Dmitry Isaikin.
2074 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2076 PP/02 Harmonised TLS library version reporting; only show if debugging.
2077 Layout now matches that introduced for other libraries in 4.74 PP/03.
2079 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2081 PP/04 New "dns_use_edns0" global option.
2083 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2086 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2087 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2089 TK/01 Updated PolarSSL code to 0.14.2.
2090 Bugzilla 1097. Patch from Andreas Metzler.
2092 PP/07 Catch divide-by-zero in ${eval:...}.
2093 Fixes bugzilla 1102.
2095 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2098 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2099 format-string attack -- SECURITY: remote arbitrary code execution.
2101 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2102 time unintentionally subject to list matching rules, letting the header
2103 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2104 arbitrary string expansion). This allowed for information disclosure.
2106 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2107 INT_MIN/-1 -- value coerced to INT_MAX.
2113 NM/01 Workaround for PCRE version dependency in version reporting
2116 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2117 This fixes portability to compilers other than gcc, notably
2118 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2120 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2121 makefiles for portability to HP-UX and POSIX correctness.
2123 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2124 Also via indented variable definition in the Makefile.
2125 (Debugging by Oliver Heesakkers).
2127 PP/02 Restore caching of spamd results with expanded spamd_address.
2128 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2130 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2131 Improves build reliability. Fix from: Frank Elsner
2133 NM/02 Fix wide character breakage in the rfc2047 coding
2134 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2136 NM/03 Allow underscore in dnslist lookups
2137 Fixes bug 1026. Patch from Graeme Fowler
2139 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2140 Code patches from Adam Ciarcinski of NetBSD.
2142 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2145 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2146 is logged, to avoid truncation. Patch from John Horne.
2148 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2149 Patch from Jakob Hirsch.
2151 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2152 SQL string expansion failure details.
2153 Patch from Andrey Oktyabrski.
2155 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2156 Patch from Simon Arlott.
2158 PP/09 New lookups functionality failed to compile on old gcc which rejects
2159 extern declarations in function scope.
2160 Patch from Oliver Fleischmann
2162 PP/10 Use sig_atomic_t for flags set from signal handlers.
2163 Check getgroups() return and improve debugging.
2164 Fixed developed for diagnosis in bug 927 (which turned out to be
2167 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2168 Patch from Mark Zealey.
2170 PP/12 Bugzilla 1056: Improved spamd server selection.
2171 Patch from Mark Zealey.
2173 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2174 Based on patch from Heiko Schlittermann.
2176 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2177 Patch from Uwe Doering, sign-off by Michael Haardt.
2179 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2180 variable declaration deep within a block. Bug and patch from
2183 PP/15 lookups-Makefile IRIX compatibility coercion.
2185 PP/16 Make DISABLE_DKIM build knob functional.
2187 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2188 Patch by Simon Arlott
2190 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2191 variable argument macros. Our copy now differs from upstream.
2197 TF/01 Failure to get a lock on a hints database can have serious
2198 consequences so log it to the panic log.
2200 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2201 controlled using the smtp_confirmation log selector.
2203 TF/03 Include the error message when we fail to unlink a spool file.
2205 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2206 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2207 for maintaining out-of-tree patches for some time.
2209 PP/01 Bugzilla 139: Documentation and portability issues.
2210 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2211 Handle per-OS dynamic-module compilation flags.
2213 PP/02 Let /dev/null have normal permissions.
2214 The 4.73 fixes were a little too stringent and complained about the
2215 permissions on /dev/null. Exempt it from some checks.
2216 Reported by Andreas M. Kirchwitz.
2218 PP/03 Report version information for many libraries, including
2219 Exim version information for dynamically loaded libraries. Created
2220 version.h, now support a version extension string for distributors
2221 who patch heavily. Dynamic module ABI change.
2223 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2224 privilege escalation vulnerability whereby the Exim run-time user
2225 can cause root to append content of the attacker's choosing to
2228 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2231 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2232 If dropping privileges for untrusted macros, we disabled normal logging
2233 on the basis that it would fail; for the Exim run-time user, this is not
2234 the case, and it resulted in successful deliveries going unlogged.
2235 Fixed. Reported by Andreas Metzler.
2241 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2242 only prepend for the Resent-* case. Fixes regression introduced in
2243 Exim 4.70 by NM/22 for Bugzilla 607.
2245 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2246 increasing numbers of administrators be bitten by this.
2248 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2250 PP/03 Bugzilla 994: added openssl_options main configuration option.
2252 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2254 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2256 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2258 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2259 without a peer certificate, leading to a segfault because of an
2260 assumption that peers always have certificates. Be a little more
2261 paranoid. Problem reported by Martin Tscholak.
2263 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2264 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2265 NB: ClamAV planning to remove STREAM in "middle of 2010".
2266 CL also introduces -bmalware, various -d+acl logging additions and
2267 more caution in buffer sizes.
2269 PP/09 Implemented reverse_ip expansion operator.
2271 PP/10 Bugzilla 937: provide a "debug" ACL control.
2273 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2275 PP/12 Bugzilla 973: Implement --version.
2277 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2279 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2281 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2283 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2284 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2285 ignore trailing whitespace.
2287 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2289 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2292 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2293 Notification from Dr Andrew Aitchison.
2295 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2296 ExtendedDetectionInfo response format.
2297 Notification from John Horne.
2299 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2302 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2303 XSL and documented dependency on system catalogs, with examples of how
2306 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2309 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2310 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2311 configuration file which is writeable by the Exim user or group.
2313 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2314 of configuration files to cover files specified with the -C option if
2315 they are going to be used with root privileges, not just the default
2318 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2319 option (effectively making it always true).
2321 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2322 files to be used while preserving root privileges.
2324 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2325 that rogue child processes cannot use them.
2327 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2328 run-time user, instead of root.
2330 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2331 Exim run-time user without dropping privileges.
2333 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2334 result string, instead of calling string_vformat() twice with the same
2337 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2338 for other users. Others should always drop root privileges if they use
2339 -C on the command line, even for a whitelisted configure file.
2341 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2343 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2349 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2350 $data_path, and $header_path variables; fixed documentation bugs and
2353 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2354 exipick to access non-standard spools, including the "frozen" queue
2357 NM/01 Bugzilla 965: Support mysql stored procedures.
2358 Patch from Alain Williams
2360 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2362 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2363 Patch from Andreas Metzler
2365 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2366 Patch from Kirill Miazine
2368 NM/05 Bugzilla 671: Added umask to procmail example.
2370 JJ/03 installed exipick 20100323.0, fixing doc bug
2372 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2373 directory. Notification and patch from Dan Rosenberg.
2375 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2377 TK/02 Improve log output when DKIM signing operation fails.
2379 MH/01 Treat the transport option dkim_domain as a colon separated
2380 list, not as a single string, and sign the message with each element,
2381 omitting multiple occurences of the same signer.
2383 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2384 Bugzilla 985, 986. Patch by Simon Arlott
2386 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2387 Patch by Simon Arlott
2389 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2390 MBX locking. Notification from Dan Rosenberg.
2396 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2398 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2400 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2402 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2404 NM/04 Bugzilla 915: Flag broken perl installation during build.
2410 TK/01 Added patch by Johannes Berg that expands the main option
2411 "spamd_address" if it starts with a dollar sign.
2413 TK/02 Write list of recipients to X-Envelope-Sender header when building
2414 the mbox-format spool file for content scanning (suggested by Jakob
2417 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2418 (http://www.dcc-servers.net/) support via dccifd. Activated by
2419 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2421 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2422 by Mark Daniel Reidel <mr@df.eu>.
2424 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2425 When building exim an external PCRE library is now needed -
2426 PCRE is a system library on the majority of modern systems.
2427 See entry on PCRE_LIBS in EDITME file.
2429 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2430 conversation. Added nologin parameter to request.
2431 Patch contributed by Kirill Miazine.
2433 TF/01 Do not log submission mode rewrites if they do not change the address.
2435 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2437 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2438 log files in place. Contributed by Roberto Lima.
2440 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2442 TF/03 Bugzilla 615: When checking the local_parts router precondition
2443 after a local_part_suffix or local_part_prefix option, Exim now
2444 does not use the address's named list lookup cache, since this
2445 contains cached lookups for the whole local part.
2447 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2448 Robert Millan. Documentation is in experimental-spec.txt.
2450 TF/04 Bugzilla 668: Fix parallel build (make -j).
2452 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2454 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2455 Patch provided by Jan Srzednicki.
2457 TF/05 Leading white space used to be stripped from $spam_report which
2458 wrecked the formatting. Now it is preserved.
2460 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2461 that they are available at delivery time.
2463 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2465 TF/08 TLS error reporting now respects the incoming_interface and
2466 incoming_port log selectors.
2468 TF/09 Produce a more useful error message if an SMTP transport's hosts
2469 setting expands to an empty string.
2471 NM/06 Bugzilla 744: EXPN did not work under TLS.
2472 Patch provided by Phil Pennock.
2474 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2475 Patch provided by Richard Godbee.
2477 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2478 acl_smtp_notquit, added index entry.
2480 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2481 Patch provided by Eugene Bujak.
2483 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2484 accept(). Patch provided by Maxim Dounin.
2486 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2487 Patch provided by Phil Pennock.
2489 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2491 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2492 Patch provided by Brad "anomie" Jorsch.
2494 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2495 Patch provided by Dean Brooks.
2497 TK/05 Add native DKIM support (does not depend on external libraries).
2499 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2500 Patch provided by Graeme Fowler.
2502 NM/16 Bugzilla 851: Documentation example syntax fix.
2504 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2506 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2509 NM/19 Bugzilla 745: TLS version reporting.
2510 Patch provided by Phil Pennock.
2512 NM/20 Bugzilla 167: bool: condition support.
2513 Patch provided by Phil Pennock.
2515 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2516 clients. Patch provided by Phil Pennock.
2518 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2519 Patch provided by Brad "anomie" Jorsch.
2521 NM/23 Bugzilla 687: Fix misparses in eximstats.
2522 Patch provided by Heiko Schlittermann.
2524 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2525 Patch provided by Heiko Schlittermann.
2527 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2528 plus update to original patch.
2530 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2532 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2533 Patch provided by David Brownlee.
2535 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2537 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2539 NM/30 Bugzilla 888: TLS documentation bugfixes.
2541 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2543 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2544 Unlike the original bugzilla I have changed all shell scripts in src tree.
2546 NM/33 Bugzilla 898: Transport filter timeout fix.
2547 Patch by Todd Rinaldo.
2549 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2550 Patch by Serge Demonchaux.
2552 NM/35 Bugzilla 39: Base64 decode bug fixes.
2553 Patch by Jakob Hirsch.
2555 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2557 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2559 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2561 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2567 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2568 ALT-N's libdkim that I have put here:
2569 http://duncanthrax.net/exim-experimental/
2571 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2572 were called 'true' and it seems that C99 defines that as a reserved
2573 keyword to be used with 'bool' variable types. That means you could
2574 not include C99-style headers which use bools without triggering
2575 build errors in sieve.c.
2577 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2578 as mailq or other aliases. Changed the --help handling significantly
2579 to do whats expected. exim_usage() emits usage/help information.
2581 SC/01 Added the -bylocaldomain option to eximstats.
2583 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2585 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2587 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2593 PH/01 Another patch from the Sieve maintainer.
2595 PH/02 When an IPv6 address is converted to a string for single-key lookup
2596 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2597 dots are used instead of colons so that keys in lsearch files need not
2598 contain colons. This was done some time before quoting was made available
2599 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2600 (notated using the quote facility) so as to distinguish them from IPv4
2601 keys. This meant that lookups for IP addresses in host lists did not work
2602 for iplsearch lookups.
2604 This has been fixed by arranging for IPv6 addresses to be expressed with
2605 colons if the lookup type is iplsearch. This is not incompatible, because
2606 previously such lookups could never work.
2608 The situation is now rather anomalous, since one *can* have colons in
2609 ordinary lsearch keys. However, making the change in all cases is
2610 incompatible and would probably break a number of configurations.
2612 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2615 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2616 conversion specification without a maximum field width, thereby enabling
2617 a rogue spamd server to cause a buffer overflow. While nobody in their
2618 right mind would setup Exim to query an untrusted spamd server, an
2619 attacker that gains access to a server running spamd could potentially
2620 exploit this vulnerability to run arbitrary code as the Exim user.
2622 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2623 $primary_hostname instead of what libspf2 thinks the hosts name is.
2625 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2626 a directory entry by the name of the lookup key. Previously, if a
2627 symlink pointed to a non-existing file or a file in a directory that
2628 Exim lacked permissions to read, a lookup for a key matching that
2629 symlink would fail. Now it is enough that a matching directory entry
2630 exists, symlink or not. (Bugzilla 503.)
2632 PH/03 The body_linecount and body_zerocount variables are now exported in the
2635 PH/04 Added the $dnslist_matched variable.
2637 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2638 This means they are set thereafter only if the connection becomes
2641 PH/06 Added the client_condition to authenticators so that some can be skipped
2642 by clients under certain conditions.
2644 PH/07 The error message for a badly-placed control=no_multiline_responses left
2645 "_responses" off the end of the name.
2647 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2649 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2650 (without spaces) instead of just copying the configuration text.
2652 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2654 PH/11 Added $max_received_linelength.
2656 PH/12 Added +ignore_defer and +include_defer to host lists.
2658 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2659 way in which PCRE > 7.0 is built.
2661 PH/14 Implemented queue_only_load_latch.
2663 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2664 MAIL command. The effect was to mangle the value on 64-bit systems.
2666 PH/16 Another patch from the Sieve maintainer.
2668 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2670 PH/18 If a system quota error occurred while trying to create the file for
2671 a maildir delivery, the message "Mailbox is full" was not appended to the
2672 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2673 only to a quota excession during the actual writing of the file.
2675 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2676 characters?) which causes problems in log lines. The DN values are now
2677 passed through string_printing() before being added to log lines.
2679 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2680 and InterBase are left for another time.)
2682 PH/21 Added message_body_newlines option.
2684 PH/22 Guard against possible overflow in moan_check_errorcopy().
2686 PH/23 POSIX allows open() to be a macro; guard against that.
2688 PH/24 If the recipient of an error message contained an @ in the local part
2689 (suitably quoted, of course), incorrect values were put in $domain and
2690 $local_part during the evaluation of errors_copy.
2696 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2697 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2700 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2701 issue a MAIL command.
2703 PH/02 In an ACL statement such as
2705 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2707 if a client was not listed at all, or was listed with a value other than
2708 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2709 the condition was not true (as it should be), so access was not denied.
2710 The bug was that the ! inversion was incorrectly passed on to the second
2711 item. This has been fixed.
2713 PH/03 Added additional dnslists conditions == and =& which are different from
2714 = and & when the dns lookup returns more than one IP address.
2716 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2717 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2719 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2720 FSYNC, which compiles an option called disable_fsync that allows for
2721 bypassing fsync(). The documentation is heavily laced with warnings.
2723 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2725 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2726 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2727 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2728 including adding "make clean"; (3) Added -fPIC when compiling the test
2729 dynamically loaded module, to get rid of a warning.
2731 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2732 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2733 = 0s. The bug is otherwise harmless.
2735 PH/07 There was a bug in the dovecot authenticator such that the value of
2736 $auth1 could be overwritten, and so not correctly preserved, after a
2737 successful authentication. This usually meant that the value preserved by
2738 the server_setid option was incorrect.
2740 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2742 PH/09 Installed PCRE release 7.0.
2744 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2745 run for batched SMTP input. It is now run at the start of every message
2746 in the batch. While fixing this I discovered that the process information
2747 (output by running exiwhat) was not always getting set for -bs and -bS
2748 input. This is fixed, and it now also says "batched" for BSMTP.
2750 PH/11 Added control=no_pipelining.
2752 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2753 patch, slightly modified), and move the expansion of helo_data till after
2754 the connection is made in the smtp transport (so it can use these
2757 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2759 PH/14 Added log_selector = +pid.
2761 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2763 PH/16 Add ${if forany and ${if forall.
2765 PH/17 Added dsn_from option to vary the From: line in DSNs.
2767 PH/18 Flush SMTP output before performing a callout, unless control =
2768 no_callout_flush is set.
2770 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2771 was true (the default) a successful delivery failed to delete the retry
2772 item, thus causing premature timeout of the address. The bug is now
2775 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2777 PH/21 Long custom messages for fakedefer and fakereject are now split up
2778 into multiline responses in the same way that messages for "deny" and
2779 other ACL rejections are.
2781 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2782 with slight modification.
2784 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2785 draft, changing the syntax and factoring some duplicate code".
2787 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2788 for deliveries of the second and subsequent messages over the same SMTP
2791 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2792 ${reduce, with only minor "tidies".
2794 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2796 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2797 expansion side effects.
2799 PH/27 When a message times out after an over-quota error from an Exim-imposed
2800 quota, the bounce message says "mailbox is full". This message was not
2801 being given when it was a system quota that was exceeded. It now should
2804 MH/03 Made $recipients available in local_scan(). local_scan() already has
2805 better access to the recipient list through recipients_list[], but
2806 $recipients can be useful in postmaster-provided expansion strings.
2808 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2809 in the case of a MAIL command with additional options following the
2810 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2811 were accidentally chopped off.
2813 PH/29 SMTP synchronization checks are implemented when a command is read -
2814 there is a check that no more input is waiting when there shouldn't be
2815 any. However, for some commands, a delay in an ACL can mean that it is
2816 some time before the response is written. In this time, more input might
2817 arrive, invalidly. So now there are extra checks after an ACL has run for
2818 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2819 pipelining has not been advertised.
2821 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2823 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2824 returned in the SMTP response when smtp_return_error_details was false.
2825 This has been fixed.
2827 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2828 instead of the C I/O that was originally supplied, because problems were
2829 reported on Solaris.
2831 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2832 Exim which did not show up earlier: it was assuming that a call to
2833 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2834 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2835 was a macro that became an assignment, so it seemed to work. This has
2836 changed to a proper function call with a void return, hence the compile
2837 error. Exim's code has been fixed.
2839 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2842 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2844 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2846 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2847 because it turns out to be too big or there is a timeout) there is no
2848 "Completed" line in the log. When some messages of this type were
2849 selected by exigrep, they were listed as "not completed". Others were
2850 picked up by some special patterns. I have improved the selection
2851 criteria to be more general.
2853 PH/38 The host_find_failed option in the manualroute router can now be set
2854 to "ignore", to completely ignore a host whose IP address cannot be
2855 found. If all hosts are ignored, the behaviour is controlled by the new
2856 host_all_ignored option.
2858 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2859 homing or because of multiple MX records with /mx) generated more than
2860 one IP address, and the following item turned out to be the local host,
2861 all the secondary addresses of the first item were incorrectly removed
2862 from the list, along with the local host and any following hosts (which
2863 is what is supposed to happen).
2865 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2866 whoever called Exim into the -H file. In the case of the daemon it was
2867 behaving confusingly. When first started, it used values for whoever
2868 started the daemon, but after a SIGHUP it used the Exim user (because it
2869 calls itself on a restart). I have changed the code so that it now always
2872 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2873 message are rejected with the same error (e.g. no authentication or bad
2874 sender address), and a DATA command is nevertheless sent (as can happen
2875 with PIPELINING or a stupid MUA), the error message that was given to the
2876 RCPT commands is included in the rejection of the DATA command. This is
2877 intended to be helpful for MUAs that show only the final error to their
2880 PH/42 Another patch from the Sieve maintainer.
2882 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2883 Eximstats - Fixed some broken HTML links and added missing column headers
2885 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2886 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2888 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2890 PH/43 Yet another patch from the Sieve maintainer.
2892 PH/44 I found a way to check for a TCP/IP connection going away before sending
2893 the response to the final '.' that terminates a message, but only in the
2894 case where the client has not sent further data following the '.'
2895 (unfortunately, this is allowed). However, in many cases there won't be
2896 any further data because there won't be any more messages to send. A call
2897 to select() can be used: if it shows that the input is "ready", there is
2898 either input waiting, or the socket has been closed. An attempt to read
2899 the next input character can distinguish the two cases. Previously, Exim
2900 would have sent an OK response which the client would never have see.
2901 This could lead to message repetition. This fix should cure that, at
2902 least in a lot of common cases.
2904 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2905 advertised in response to EHLO.
2911 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2912 fixed by 4.65/MH/01 (is this a record?) are fixed:
2914 (i) An empty string was always treated as zero by the numeric comparison
2915 operators. This behaviour has been restored.
2917 (ii) It is documented that the numeric comparison operators always treat
2918 their arguments as decimal numbers. This was broken in that numbers
2919 starting with 0 were being interpreted as octal.
2921 While fixing these problems I realized that there was another issue that
2922 hadn't been noticed. Values of message_size_limit (both the global option
2923 and the transport option) were treated as octal if they started with 0.
2924 The documentation was vague. These values are now always treated as
2925 decimal, and I will make that clear in the documentation.
2931 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2932 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2935 MH/01 Don't check that the operands of numeric comparison operators are
2936 integers when their expansion is in "skipping" mode (fixes bug
2937 introduced by 4.64-PH/07).
2939 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2940 child addresses, Exim now panics and dies. Previously, because the count
2941 is held in a short int, deliveries were likely to be lost. As such a
2942 large number of recipients for a single message is ridiculous
2943 (performance will be very, very poor), I have chosen to impose a limit
2944 rather than extend the field.
2950 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2951 leftover -K file (the existence of which was triggered by #402).
2952 While we were at it, introduced process PID as part of the -K
2953 filename. This should rule out race conditions when creating
2956 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2957 processing considerably. Previous code took too long for large mails,
2958 triggering a timeout which in turn triggers #401.
2960 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2961 in the DK code in transports.c. sendfile() is not really portable,
2962 hence the _LINUX specificness.
2964 TF/01 In the add_headers option to the mail command in an Exim filter,
2965 there was a bug that Exim would claim a syntax error in any
2966 header after the first one which had an odd number of characters
2969 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2970 callout verification, Exim cached a "reject" for the entire domain. This
2971 is correct for most verifications, but it is not correct for a recipient
2972 verification with use_sender or use_postmaster set, because in that case
2973 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2974 case of MAIL FROM:<> rejection from other early rejections (e.g.
2975 rejection of HELO). When verifying a recipient using a non-null MAIL
2976 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2977 Whatever the result of the callout, the value of the domain cache is
2978 left unchanged (for any other kind of callout, getting as far as trying
2979 RCPT means that the domain itself is ok).
2981 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2984 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2985 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2986 session, the daemon ignores ECONNECT errors and logs others; it now
2987 ignores EPIPE as well.
2989 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2990 (quoted-printable decoding).
2992 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2993 later the small subsequent patch to fix an introduced bug.
2995 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2997 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2999 PH/08 An error is now given if message_size_limit is specified negative.
3001 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3002 to be given (somewhat) arbitrary names.
3004 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3007 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3008 miscellaneous code fixes
3010 PH/10 Added the log_reject_target ACL modifier to specify where to log
3013 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3014 hostname. This is wrong, because it relates to the incoming message (and
3015 probably the interface on which it is arriving) and not to the outgoing
3016 callout (which could be using a different interface). This has been
3017 changed to use the value of the helo_data option from the smtp transport
3018 instead - this is what is used when a message is actually being sent. If
3019 there is no remote transport (possible with a router that sets up host
3020 addresses), $smtp_active_hostname is used.
3022 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3023 tweaks were necessary in order to get it to work (see also 21 below):
3024 (a) The code assumed that strncpy() returns a negative number on buffer
3025 overflow, which isn't the case. Replaced with Exim's string_format()
3027 (b) There were several signed/unsigned issues. I just did the minimum
3028 hacking in of casts. There is scope for a larger refactoring.
3029 (c) The code used strcasecmp() which is not a standard C function.
3030 Replaced with Exim's strcmpic() function.
3031 (d) The code set only $1; it now sets $auth1 as well.
3032 (e) A simple test gave the error "authentication client didn't specify
3033 service in request". It would seem that Dovecot has changed its
3034 interface. Fortunately there's a specification; I followed it and
3035 changed what the client sends and it appears to be working now.
3037 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3040 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3041 address A is aliased to B and C, where B exists and C does not. Without
3042 -v the output is "A verified" because verification stops after a
3043 successful redirection if more than one address is generated. However,
3044 with -v the child addresses are also verified. Exim was outputting "A
3045 failed to verify" and then showing the successful verification for C,
3046 with its parentage. It now outputs "B failed to verify", showing B's
3047 parentage before showing the successful verification of C.
3049 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3050 look up a TXT record in a specific list after matching in a combined
3053 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3054 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3055 they consult the DNS. I had assumed they would set it the way they
3056 wanted; and indeed my experiments on Linux seem to show that in some
3057 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3058 To be on the safe side, however, I have now made the interface to
3059 host_find_byname() similar to host_find_bydns(), with an argument
3060 containing the DNS resolver options. The host_find_byname() function now
3061 sets these options at its start, just as host_find_bydns() does. The smtp
3062 transport options dns_qualify_single and dns_search_parents are passed to
3063 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3064 of host_find_byname() use the default settings of RES_DEFNAMES
3065 (qualify_single) but not RES_DNSRCH (search_parents).
3067 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3068 spool_read_header() do less string testing, by means of a preliminary
3069 switch on the second character of optional "-foo" lines. (This is
3070 overdue, caused by the large number of possibilities that now exist.
3071 Originally there were few.) While I was there, I also converted the
3072 str(n)cmp tests so they don't re-test the leading "-" and the first
3073 character, in the hope this might squeeze out yet more improvement.
3075 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3076 flag allowing group syntax was set by the header_syntax check but not
3077 turned off, possible causing trouble later; (2) The flag was not being
3078 set at all for the header_verify test, causing "group"-style headers to
3079 be rejected. I have now set it in this case, and also caused header_
3080 verify to ignore an empty address taken from a group. While doing this, I
3081 came across some other cases where the code for allowing group syntax
3082 while scanning a header line wasn't quite right (mostly, not resetting
3083 the flag correctly in the right place). These bugs could have caused
3084 trouble for malformed header lines. I hope it is now all correct.
3086 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3087 with the "reply" argument non-NULL. The code, however (which originally
3088 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3089 but it didn't always do it. This confused somebody who was copying the
3090 code for some other use. I have removed all the tests.
3092 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3093 feature that was used to support insecure browsers during the U.S. crypto
3094 embargo. It requires special client support, and Exim is probably the
3095 only MTA that supported it -- and would never use it because real RSA is
3096 always available. This code has been removed, because it had the bad
3097 effect of slowing Exim down by computing (never used) parameters for the
3098 RSA_EXPORT functionality.
3100 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3101 authenticator to fail if there's a tab character in the incoming data
3102 (there should never be unless someone is messing about, as it's supposed
3103 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3104 if the connection is using TLS or if the remote IP is the same as the
3105 local IP, and the "valid-client-cert option" if a client certificate has
3108 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3109 authenticators. This can be used for authorization after authentication
3110 succeeds. (In the case of plaintext, it servers for both authentication
3113 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3114 if any retry times were supplied.
3116 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3117 connection, where there is no client IP address to check. In this
3118 situation, the verify now always succeeds.
3120 PH/25 Applied John Jetmore's -Mset patch.
3122 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3124 PH/27 In a string expansion for a processed (not raw) header when multiple
3125 headers of the same name were present, leading whitespace was being
3126 removed from all of them, but trailing whitespace was being removed only
3127 from the last one. Now trailing whitespace is removed from each header
3128 before concatenation. Completely empty headers in a concatenation (as
3129 before) are ignored.
3131 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3132 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3134 PH/29 [Removed. This was a change that I later backed out, and forgot to
3135 correct the ChangeLog entry (that I had efficiently created) before
3136 committing the later change.]
3138 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3139 address errors (4xx response to RCPT) over the same connection as other
3140 messages routed to the same hosts. Such deliveries are always "forced",
3141 so retry times are not inspected. This resulted in far too many retries
3142 for the affected addresses. The effect occurred only when there were more
3143 hosts than the hosts_max_try setting in the smtp transport when it had
3144 the 4xx errors. Those hosts that it had tried were not added to the list
3145 of hosts for which the message was waiting, so if all were tried, there
3146 was no problem. Two fixes have been applied:
3148 (i) If there are any address or message errors in an SMTP delivery, none
3149 of the hosts (tried or untried) are now added to the list of hosts
3150 for which the message is waiting, so the message should not be a
3151 candidate for sending over the same connection that was used for a
3152 successful delivery of some other message. This seems entirely
3153 reasonable: after all the message is NOT "waiting for some host".
3154 This is so "obvious" that I'm not sure why it wasn't done
3155 previously. Hope I haven't missed anything, but it can't do any
3156 harm, as the worst effect is to miss an optimization.
3158 (ii) If, despite (i), such a delivery is accidentally attempted, the
3159 routing retry time is respected, so at least it doesn't keep
3160 hammering the server.
3162 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3163 in ${readsocket because some servers need this prod.
3165 PH/32 Added some extra debug output when updating a wait-xxx database.
3167 PH/33 The hint "could be header name not terminated by colon", which has been
3168 given for certain expansion errors for a long time, was not being given
3169 for the ${if def:h_colon_omitted{... case.
3171 PH/34 The spec says: "With one important exception, whenever a domain list is
3172 being scanned, $domain contains the subject domain." There was at least
3173 one case where this was not true.
3175 PH/35 The error "getsockname() failed: connection reset by peer" was being
3176 written to the panic log as well as the main log, but it isn't really
3177 panic-worthy as it just means the connection died rather early on. I have
3178 removed the panic log writing for the ECONNRESET error when getsockname()
3181 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3182 runs only) independently of the message's sender address. This meant
3183 that, if the 4xx error was in fact related to the sender, a different
3184 message to the same recipient with a different sender could confuse
3185 things. In particular, this can happen when sending to a greylisting
3186 server, but other circumstances could also provoke similar problems.
3187 I have changed the default so that the retry time for these errors is now
3188 based a combination of the sender and recipient addresses. This change
3189 can be overridden by setting address_retry_include_sender=false in the
3192 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3193 remote server are returned as part of bounce messages. This was not
3194 happening for LMTP over a pipe (the lmtp transport), but now it is the
3195 same for both kinds of LMTP.
3197 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3198 in header lines that were in fact CNAMEs. This is no longer the case.
3200 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3201 and queue runs started by the daemon processed all messages. This has
3202 been fixed so that -R and -S can now usefully be given with -q<time>.
3204 PH/40 Import PCRE release 6.7 (fixes some bugs).
3206 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3208 PH/42 Give an error if -q is specified more than once.
3210 PH/43 Renamed the variables $interface_address and $interface_port as
3211 $received_ip_address and $received_port, to make it clear that these
3212 values apply to message reception, and not to the outgoing interface when
3213 a message is delivered. (The old names remain recognized, of course.)
3215 PH/44 There was no timeout on the connect() call when using a Unix domain
3216 socket in the ${readsocket expansion. There now is.
3218 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3219 be meaningful with "accept".
3221 SC/01 Eximstats V1.43
3222 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3224 SC/02 Eximstats V1.44
3225 Use a glob alias rather than an array ref in the generated
3226 parser. This improves both readability and performance.
3228 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3229 Collect SpamAssassin and rejection statistics.
3230 Don't display local sender or destination tables unless
3231 there is data to show.
3232 Added average volumes into the top table text output.
3234 SC/04 Eximstats V1.46
3235 Collect data on the number of addresses (recipients)
3236 as well as the number of messages.
3238 SC/05 Eximstats V1.47
3239 Added 'Message too big' to the list of mail rejection
3240 reasons (thanks to Marco Gaiarin).
3242 SC/06 Eximstats V1.48
3243 Mainlog lines which have GMT offsets and are too short to
3244 have a flag are now skipped.
3246 SC/07 Eximstats V1.49 (Alain Williams)
3247 Added the -emptyok flag.
3249 SC/08 Eximstats V1.50
3250 Fixes for obtaining the IP address from reject messages.
3252 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3253 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3254 whitespace changes from 4.64-PH/27
3256 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3259 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3260 are found, allow negative numbers in numeric criteria)
3262 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3264 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3265 to match changes made in 4.64-PH/43
3267 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3269 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3270 "domain" is actually an IP address, and force a failure. This locks out
3271 those revolvers/nameservers that support "A-for-A" lookups, in
3272 contravention of the specifications.
3274 PH/48 When a host name was looked up from an IP address, and the subsequent
3275 forward lookup of the name timed out, the host name was left in
3276 $sender_host_name, contrary to the specification.
3278 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3279 restricted to single-key lookups, Exim was not diagnosing an error if
3280 * or *@ was used with a query-style lookup.
3282 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3284 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3285 long ago, but noone interested enough thought of it. Let's just say that
3286 the "1.1" means that there are some new functions that weren't there at
3287 some point in the past.
3289 PH/51 Error processing for expansion failure of helo_data from an smtp
3290 transport during callout processing was broken.
3292 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3293 tested/used via the -bh/-bhc/-bs options.
3295 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3296 bug, fixed in subsequent PCRE releases).
3298 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3299 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3301 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3307 SC/01 Use a glob alias rather than an array ref in eximstats generated
3308 parser. This improves both readability and performance.
3310 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3311 Don't display local sender or destination tables in eximstats unless
3312 there is data to show.
3313 Added average volumes into the eximstats top table text output.
3315 SC/03 Collect data on the number of addresses (recipients) as well
3316 as the number of messages in eximstats.
3318 TF/01 Correct an error in the documentation for the redirect router. Exim
3319 does (usually) call initgroups() when daemonizing.
3321 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3322 with consistent privilege compared to when running as a daemon.
3324 TF/03 Note in the spec that $authenticated_id is not set for local
3325 submissions from trusted users.
3327 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3328 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3330 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3331 by adding some example configuration directives to the default
3332 configuration file. A little bit of work is required to uncomment the
3333 directives and define how usernames and passwords are checked, but
3334 there is now a framework to start from.
3336 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3337 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3338 without this. I don't know how relevant this is to other LDAP libraries.
3340 PH/02 Add the verb name to the "unknown ACL verb" error.
3342 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3344 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3346 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3347 directory not expanded when it should be if an expanded home directory
3348 was set for the address (which is overridden by the transport).
3350 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3353 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3354 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3355 because it is too late at that time, and has no effect.
3357 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3358 security issue with \' (bugzilla #107). I could not use the
3359 PQescapeStringConn() function, because it needs a PGconn value as one of
3362 PH/08 When testing addresses using -bt, indicate those final addresses that
3363 are duplicates that would not cause an additional delivery. At least one
3364 person was confused, thinking that -bt output corresponded to deliveries.
3365 (Suppressing duplicates isn't a good idea as you lose the information
3366 about possibly different redirections that led to the duplicates.)
3368 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3369 systems where poll() doesn't work, in particular OS X.
3371 PH/10 Added more information to debugging output for retry time not reached.
3373 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3374 operations in malware.c.
3376 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3379 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3380 syslog_duplication set false, log lines that would normally be written
3381 both the the main log and to the reject log were not written to syslog at
3384 PH/14 In the default configuration, change the use of "message" in ACL warn
3385 statements to "add_header".
3387 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3388 not followed by a command (e.g. "seen endif").
3390 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3391 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3394 PH/17 Added extra conditions to the default value of delay_warning_condition
3398 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3399 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3400 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3403 The Auto-Submitted: and various List- headers are standardised, whereas I
3404 don't think Precedence: ever was.
3406 PH/18 Refactored debugging code in route_finduser() to show more information,
3407 in particular, the error code if getpwnam() issues one.
3409 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3410 This is apparently needed in addition to the PH/07 change above to avoid
3411 any possible encoding problems.
3413 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3414 but not after initializing Perl.
3416 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3417 output them only if debugging. By default they are written stderr,
3418 apparently, which is not desirable.
3420 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3423 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3426 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3428 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3429 authenticated or an ident call has been made. Suppress the default
3430 values for $authenticated_id and $authenticated_sender (but permit -oMai
3431 and -oMas) when testing with -bh.
3433 PH/24 Re-jigged the order of the tests in the default configuration so that the
3434 tests for valid domains and recipients precede the DNS black list and CSA
3435 tests, on the grounds that those ones are more expensive.
3437 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3438 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3439 This bug exists in every version of Exim that I still have, right back to
3442 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3443 However, an attempt to turn on case-sensitivity in a regex key by
3444 including (?-i) didn't work because the subject string was already
3445 lowercased, and the effects were non-intuitive. It turns out that a
3446 one-line patch can be used to allow (?-i) to work as expected.
3452 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3453 other effects) broke the use of negated acl sub-conditions.
3455 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3458 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3459 "Deny" causes Exim to reject the incoming connection with a 554 error.
3460 Unfortunately, if there is a major crisis, such as a disk failure,
3461 tcp-wrappers gives "deny", whereas what one would like would be some
3462 kind of temporary error. A kludge has been added to help with this.
3463 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3464 554 error is used if errno is still zero or contains ENOENT (which occurs
3465 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3468 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3470 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3471 errors. Otherwise a message that provokes a temporary error (when other
3472 messages do not) can cause a whole host to time out.
3474 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3475 addresses were routed directly to files or pipes from a redirect router.
3476 File deliveries just didn't batch; pipe deliveries might have suffered
3479 PH/06 A failure to get a lock for a hints database would erroneously always say
3480 "Failed to get write lock", even when it was really a read lock.
3482 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3483 of 0600. This has been changed to use the value of the lockfile_mode
3484 option (which defaults to 0600).
3486 PH/08 Applied small patch from the Sieve maintainer.
3488 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3489 folder from quota calculations, a direct delivery into this folder messed
3490 up the contents of the maildirsize file. This was because the regex was
3491 used only to exclude .Trash (or whatever) when the size of the mailbox
3492 was calculated. There was no check that a delivery was happening into an
3493 excluded directory. This bug has been fixed by ignoring all quota
3494 processing for deliveries into excluded directories.
3496 PH/10 Added the maildirfolder_create_regex option to appendfile.
3502 PH/01 The code for finding all the local interface addresses on a FreeBSD
3503 system running IPv6 was broken. This may well have applied to all BSD
3504 systems, as well as to others that have similar system calls. The broken
3505 code found IPv4 interfaces correctly, but gave incorrect values for the
3506 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3507 that it would not match correctly against @[] and not recognize the IPv6
3510 PH/02 The ipliteral router was not recognizing addresses of the form user@
3511 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3513 PH/03 Added disable_ipv6.
3515 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3516 decoded form, because it is most often used to construct To: headers
3517 lines in autoreplies, and the decoded form may well be syntactically
3518 invalid. However, $reply_address has leading white space removed, and all
3519 newlines turned into spaces so that the autoreply transport does not
3522 PH/05 If group was specified without a user on a router, and no group or user
3523 was specified on a transport, the group from the router was ignored.
3525 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3526 for visible compile-time settings that can be used to change these
3527 numbers, for those that want even more. Backwards compatibility with old
3528 spool files has been maintained. However, going back to a previous Exim
3529 release will lost any variables that are in spool files.
3531 PH/07 Two small changes when running in the test harness: increase delay when
3532 passing a TCP/IP connection to a new process, in case the original
3533 process has to generate a bounce, and remove special handling of
3534 127.0.0.2 (sic), which is no longer necessary.
3536 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3537 be the same on different OS.
3539 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3542 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3543 whether --show-vars was specified or not
3545 JJ/02 exipick: Added support for new ACL variable spool format introduced
3548 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3549 syntactically invalid From: or Reply-to: line, and a filter used this to
3550 generate an autoreply, and therefore failed to obtain an address for the
3551 autoreply, Exim could try to deliver to a non-existent relative file
3552 name, causing unrelated and misleading errors. What now happens is that
3553 it logs this as a hard delivery error, but does not attempt to create a
3556 PH/11 The exinext utility has a -C option for testing purposes, but although
3557 the given file was scanned by exinext itself; it wasn't being passed on
3558 when Exim was called.
3560 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3561 an end-of-file indication when reading a command response.
3563 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3564 compiled. In many other places in Exim, IPv6 addresses are always
3565 recognized, so I have changed this. It also means that IPv4 domain
3566 literals of the form [IPV4:n.n.n.n] are now always recognized.
3568 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3569 used if the router is not running as root, for example, when verifying at
3570 ACL time, or when using -bh. The debugging output from this situation was
3571 non-existent - all you got was a failure to exec. I have made two
3574 (a) Failures to set uid/gid, the current directory, or a process leader
3575 in a subprocess such as that created by queryprogram now generate
3576 suitable debugging output when -d is set.
3578 (b) The queryprogram router detects when it is not running as root,
3579 outputs suitable debugging information if -d is set, and then runs
3580 the subprocess without attempting to change uid/gid.
3582 PH/15 Minor change to Makefile for building test_host (undocumented testing
3585 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3586 additional section of a DNS packet that returns MX or SRV records.
3587 Instead, it always explicitly searches for A/AAAA records. This avoids
3588 major problems that occur when a DNS server includes only records of one
3589 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3590 fixed another bug: if SRV records were looked up and the corresponding
3591 address records were *not* found in the additional section, the port
3592 values from the SRV records were lost.
3594 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3595 using the correct key (the original address) when searching the retry
3596 rules in order to find which one to use for generating the retry hint.
3598 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3599 adding the default one. Similarly, if it contains a Reply-To: header, the
3600 errors_reply_to option, if set, is not used.
3602 PH/19 When calculating a retry time, Exim used to measure the "time since
3603 failure" by looking at the "first failed" field in the retry record. Now
3604 it does not use this if it is later than than the arrival time of the
3605 message. Instead it uses the arrival time. This makes for better
3606 behaviour in cases where some deliveries succeed, thus re-setting the
3607 "first failed" field. An example is a quota failure for a huge message
3608 when small messages continue to be delivered. Without this change, the
3609 "time since failure" will always be short, possible causing more frequent
3610 delivery attempts for the huge message than are intended.
3611 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3613 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3614 $1, $2, $3) because the numerical variables can be reset during some
3615 expansion items (e.g. "match"), thereby losing the authentication data.
3617 PH/21 Make -bV show the size of off_t variables so that the test suite can
3618 decide whether to run tests for quotas > 2G.
3620 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3621 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3622 filecount value is greater than 2G or if a quota value is greater than 2G
3623 on a system where the size of off_t is not greater than 4, a panic error
3626 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3627 never match. The debug and -bh output now contains an explicit error
3628 message indicating a malformed IPv4 address or mask.
3630 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3631 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3632 PH/23 above applies.
3634 PH/25 Do not write to syslog when running in the test harness. The only
3635 occasion when this arises is a failure to open the main or panic logs
3636 (for which there is an explicit test).
3638 PH/26 Added the /no_tell option to "control=freeze".
3640 PH/27 If a host name lookup failed very early in a connection, for example, if
3641 the IP address matched host_lookup and the reverse lookup yielded a name
3642 that did not have a forward lookup, an error message of the form "no IP
3643 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3644 could be logged. Now it outputs the IP address instead of "NULL".
3646 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3647 allows the sender and the authenticated sender to be set when
3648 submitting a message from within Exim. Since child_open_exim() is
3649 documented for local_scan(), the new function should be too.
3651 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3652 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3653 results in an empty string is now treated as unset.
3655 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3657 PH/31 Added sender_verify_fail logging option.
3659 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3660 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3661 tidied the source and removed it altogether.
3663 PH/33 When a queue run was abandoned because the load average was too high, a
3664 log line was always written; now it is written only if the queue_run log
3665 selector is set. In addition, the log line for abandonment now contains
3666 information about the queue run such as the pid. This is always present
3667 in "start" and "stop" lines but was omitted from the "abandon" line.
3669 PH/34 Omit spaces between a header name and the colon in the error message that
3670 is given when verify = headers_syntax fails (if there are lots of them,
3671 the message gets confusing).
3673 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3674 names, as there are now some PTR records that contain slashes. This check
3675 is only to protect against broken name servers that fall over on strange
3676 characters, so the fact that it applies to all lookups doesn't matter.
3678 PH/36 Now that the new test suite is complete, we can remove some of the
3679 special code in Exim that was needed for the old test suite. For example,
3680 sorting DNS records because real resolvers return them in an arbitrary
3681 order. The new test suite's fake resolver always returns records in the
3684 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3685 bounces) except when queue_only is set, to avoid logging races between
3686 the different processes.
3688 PH/38 Panic-die if .include specifies a non-absolute path.
3690 PH/39 A tweak to the "H" retry rule from its user.
3692 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3693 a label. They prevented compilation on older perls.
3695 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3696 a warning to be raised on newish perls.
3698 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3699 on queue. Changes to match documented behaviour of showing count of
3700 messages matching specified criteria.
3702 PH/40 Changed the default ident timeout from 30s to 5s.
3704 PH/41 Added support for the use of login_cap features, on those BSD systems
3705 that have them, for controlling the resources used by pipe deliveries.
3707 PH/42 The content-scanning code uses fopen() to create files in which to put
3708 message data. Previously it was not paying any attention to the mode of
3709 the files. Exim runs with umask(0) because the rest of the code creates
3710 files with open(), and sets the required mode explicitly. Thus, these
3711 files were ending up world-writeable. This was not a big issue, because,
3712 being within the spool directory, they were not world-accessible. I have
3713 created a function called modefopen, which takes an additional mode
3714 argument. It sets umask(777), creates the file, chmods it to the required
3715 mode, then resets the umask. All the relevant calls to fopen() in the
3716 content scanning code have been changed to use this function.
3718 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3719 to 24 hours. This avoids potential overflow problems when processing G
3720 and H retry rules. I suspect nobody ever tinkers with this value.
3722 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3724 PH/45 When the plaintext authenticator is running as a client, the server's
3725 challenges are checked to ensure they are valid base64 strings. By
3726 default, the authentication attempt is cancelled if an invalid string is
3727 received. Setting client_ignore_invalid_base64 true ignores these errors.
3728 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3729 they are received. Thus, the responses can be made to depend on the
3730 challenges. If an invalid string is ignored, an empty string is placed in
3733 PH/46 Messages that are created by the autoreply transport now contains a
3734 References: header, in accordance with RFCs 2822 and 3834.
3736 PH/47 Added authenticated_sender_force to the smtp transport.
3738 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3740 PH/49 Installed latest patch from the Sieve maintainer.
3742 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3743 was also set, the appendfile transport was unnecessarily scanning a
3744 directory of message files (e.g. for maildir delivery) to find the count
3745 of files (along with the size), even though it did not need this
3746 information. It now does the scan only if it needs to find either the
3747 size of the count of files.
3749 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3751 PH/52 Two bugs concerned with error handling when the smtp transport is
3754 (i) Exim was not creating retry information for temporary errors given
3755 for individual recipients after the DATA command when the smtp transport
3756 was used in LMTP mode. This meant that they could be retried too
3757 frequently, and not timed out correctly.
3759 (ii) Exim was setting the flag that allows error details to be returned
3760 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3761 recipients that were returned after the DATA command.
3763 PH/53 This is related to PH/52, but is more general: for any failing address,
3764 when detailed error information was permitted to be returned to the
3765 sender, but the error was temporary, then after the final timeout, only
3766 "retry timeout exceeded" was returned. Now it returns the full error as
3767 well as "retry timeout exceeded".
3769 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3770 do this, and (what is worse) MTAs that accept it.
3772 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3773 will now be deprecated.
3775 PH/56 New os.c-cygwin from the Cygwin maintainer.
3777 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3778 formats (previously only available in exim formats via -bpr, -bpru,
3779 and -bpra. Now also available in native and exiqgrep formats)
3781 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3782 with very large, slow to parse queues
3784 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3786 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3788 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3789 responses to authentication challenges, though it was showing the
3790 challenges; (ii) I've removed the CR characters from the debug output for
3793 PH/58 Allow for the insertion of a newline as well as a space when a string
3794 is turned into more than one encoded-word during RFC 2047 encoding. The
3795 Sieve code now uses this.
3797 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3798 data_4xx, lost_connection, tls_required.
3800 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3801 message was being sent as an SMTP response.
3803 PH/61 Add -l and -k options to exicyclog.
3805 PH/62 When verifying, if an address was redirected to one new address, so that
3806 verification continued, and the new address failed or deferred after
3807 having set something in $address_data, the value of $address_data was not
3808 passed back to the ACL. This was different to the case when no
3809 redirection occurred. The value is now passed back in both cases.
3811 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3812 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3813 use login_cap.h, so on its own it isn't the distinguishing feature. The
3814 new name refers directly to the setclassresources() function.
3816 PH/65 Added configuration files for NetBSD3.
3818 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3820 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3821 is preferred over IPv4.
3823 PH/68 The bounce_return_message and bounce_return_body options were not being
3824 honoured for bounces generated during the reception of non-SMTP messages.
3825 In particular, this applied to messages rejected by the ACL. This bug has
3826 been fixed. However, if bounce_return_message is true and bounce_return_
3827 body is false, the headers that are returned for a non-SMTP message
3828 include only those that have been read before the error was detected.
3829 (In the case of an ACL rejection, they have all been read.)
3831 PH/69 The HTML version of the specification is now built in a directory called
3832 spec_html instead of spec.html, because the latter looks like a path with
3833 a MIME-type, and this confuses some software.
3835 PH/70 Catch two compiler warnings in sieve.c.
3837 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3838 function verify_get_ident() calls ip_connect() to connect a socket, but
3839 if the "connect()" function timed out, ip_connect() used to close the
3840 socket. However, verify_get_ident() also closes the socket later, and in
3841 between Exim writes to the log, which may get opened at this point. When
3842 the socket was closed in ip_connect(), the log could get the same file
3843 descriptor number as the socket. This naturally causes chaos. The fix is
3844 not to close the socket in ip_connect(); the socket should be closed by
3845 the function that creates it. There was only one place in the code where
3846 this was missing, in the iplookup router, which I don't think anybody now
3847 uses, but I've fixed it anyway.
3849 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3850 well as to direct DNS lookups. Otherwise the handling of names in host
3851 lists is inconsistent and therefore confusing.
3857 PH/01 Two changes to the default runtime configuration:
3859 (1) Move the checks for relay_from_hosts and authenticated clients from
3860 after to before the (commented out) DNS black list checks.
3862 (2) Add control=submission to the relay_from_hosts and authenticated
3863 clients checks, on the grounds that messages accepted by these
3864 statements are most likely to be submissions.
3866 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3868 (1) Generate an error if the third argument for the ${prvs expansion is
3871 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3874 (3) Reset the variables that are obtained from the first argument of
3875 ${prvscheck and used in the second argument before leaving the code,
3876 because their memory is reclaimed, so using them afterwards may do
3879 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3880 one (it's much easier than Tom thought :-).
3882 (5) Because of (4), we can now allow for the use of $prvscheck_result
3883 inside the third argument.
3885 PH/03 For some reason, the default setting of PATH when running a command from
3886 a pipe transport was just "/usr/bin". I have changed it to
3889 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3890 anything to be listed in the output from -bV.
3892 PH/05 When a filter generated an autoreply, the entire To: header line was
3893 quoted in the delivery log line, like this:
3895 => >A.N.Other <ano@some.domain> <original@ddress> ...
3897 This has been changed so that it extracts the operative address. There
3898 may be more than one such address. If so, they are comma-separated, like
3901 => >ano@some.domain,ona@other.domain <original@ddress> ...
3903 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3904 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3905 not being looked up in the rDNS to get a host name, Exim was showing the
3906 IP address twice in Received: lines, even though the IP addresses were
3907 identical. For example:
3909 Received: from [1.2.3.4] (helo=[1.2.3.4])
3911 However, if the real host name was known, it was omitting the HELO data
3912 if it matched the actual IP address. This has been tidied up so that it
3913 doesn't show the same IP address twice.
3915 PH/07 When both +timestamp and +memory debugging was on, the value given by
3916 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3917 called by the debug printing, thereby overwriting the timestamp buffer.
3918 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3920 PH/08 When the original message was included in an autoreply transport, it
3921 always said "this is a copy of the message, including all the headers",
3922 even if body_only or headers_only was set. It now gives an appropriate
3925 PH/09 Applied a patch from the Sieve maintainer which:
3927 o fixes some comments
3928 o adds the (disabled) notify extension core
3929 o adds some debug output for the result of if/elsif tests
3930 o points to the current vacation draft in the documentation
3931 and documents the missing references header update
3935 o fixes a bug in processing the envelope test (when testing
3936 multiple envelope elements, the last element determined the
3939 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3940 Electronic Mail") by including:
3942 Auto-submitted: auto-generated
3944 in the messages that it generates (bounce messages and others, such as
3945 warnings). In the case of bounce messages for non-SMTP messages, there was
3946 also a typo: it was using "Auto_submitted" (underscore instead of
3947 hyphen). Since every message generated by Exim is necessarily in response
3948 to another message, thes have all been changed to:
3950 Auto-Submitted: auto-replied
3952 in accordance with these statements in the RFC:
3954 The auto-replied keyword:
3956 - SHOULD be used on messages sent in direct response to another
3957 message by an automatic process,
3959 - MUST NOT be used on manually-generated messages,
3961 - MAY be used on Delivery Status Notifications (DSNs) and Message
3962 Disposition Notifications (MDNs),
3964 - MUST NOT be used on messages generated by automatic or periodic
3965 processes, except for messages which are automatic responses to
3968 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3969 to the default Received: header definition.
3971 PH/12 Added log selector acl_warn_skipped (default on).
3973 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3974 variables because (a) they are in the wrong storage pool and (b) even if
3975 they were copied, it wouldn't work properly because of the caching.
3977 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3978 checking when decoding. Apparently there are clients that generate
3979 overlong encoded strings. Why am I not surprised?
3981 PH/15 If the first argument of "${if match_address" was not empty, but did not
3982 contain an "@" character, Exim crashed. Now it writes a panic log message
3983 and treats the condition as false.
3985 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3987 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3988 extension "envelope-auth". The code is finished and in agreement with
3989 other implementations, but there is no documentation so far and in fact,
3990 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3991 not changing the active code.
3993 Print executed "if" and "elsif" statements when debugging is used. This
3994 helps a great deal to understand what a filter does.
3996 Document more things not specified clearly in RFC3028. I had all this
3997 sorted out, when out of a sudden new issues came to my mind. Oops."
3999 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4002 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4003 canonical form (as documented). However, after a host name lookup from
4004 the IP address, check_host() was doing a simple string comparison with
4005 addresses acquired from the DNS when checking that the found name did
4006 have the original IP as one of its addresses. Since any found IPv6
4007 addresses are likely to be in abbreviated form, the comparison could
4008 fail. Luckily, there already exists a function for doing the comparison
4009 by converting both addresses to binary, so now that is used instead of
4010 the text comparison.
4012 PH/20 There was another similar case to PH/19, when a complete host name was
4013 given in a host list; looking up its IP address could give an abbreviated
4014 form, whereas the current host's name might or might not be abbreviated.
4015 The same fix has been applied.
4021 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4022 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4025 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4026 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4028 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4030 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4031 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4032 Also, for "Auto-Submitted", treat anything other than "no" as
4033 non-personal, in accordance with RFC 3834. (Previously it treated
4034 anything starting "auto-" as non-personal.)
4036 TF/01 The control=submission/name=... option had a problem with syntax
4037 errors if the name included a slash character. The /name= option
4038 now slurps the rest of the string, so it can include any characters
4039 but it must come last in the list of options (after /sender_retain
4042 PH/05 Some modifications to the interface to the fake nameserver for the new
4050 TK/01 Added the "success_on_redirect" address verification option. See
4051 NewStuff for rationale and an example.
4053 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4055 PH/02 Patch to exigrep to allow it to work on syslog lines.
4057 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4058 fread() to skip over the body file's header line, because in Cygwin the
4059 header line is locked and is inaccessible.
4061 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4062 co-exist for some time) to make it clear that it is the Exim ID that is
4063 referenced, not the Message-ID: header line.
4065 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4066 string_format() function, because snprintf() does not exist on all
4069 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4070 ${stat: expansion item.
4072 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4073 protocol synchronization error", to keep the pedants happy.
4075 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4076 well as for IRIX systems, when gcc is being used. See the host.c source
4079 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4081 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4084 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4085 transport and to the smtp transport in LMTP mode.
4087 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4089 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4090 run a filter in a subprocess. This could lead to confusion in subsequent
4091 lookups in the parent process. There should also be a search_tidyup() at
4092 the end of the subprocess.
4094 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4095 only if the host matched helo_try_verify_hosts, which caused the
4096 verification to occur when the EHLO/HELO command was issued. The ACL just
4097 tested the remembered result. Now, if a previous verification attempt has
4098 not happened, "verify = helo" does it there and then.
4100 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4102 TK/03 Fix log output including CR from clamd.
4104 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4105 exist provoked a memory error which could cause a segfault.
4107 PH/15 Installed PCRE 6.2
4109 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4111 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4112 of the problem. Specifically, suggested +O2 rather than +O1 for the
4115 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4117 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4118 record, the port was not correctly logged when the outgoing_port log
4119 selector was set (it logged the transort's default port).
4121 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4122 fallback_hosts, and "hosts" in the smtp transport.
4124 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4125 host errors such as "Connection refused".
4127 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4128 authentication with radiusclient 0.4.9:
4130 - Error returned from rc_read_config was caught wrongly
4131 - Username/password not passed on to radius server due to wrong length.
4133 The presumption is that some radiusclient API changes for 4.51/PH/17
4134 were not taken care of correctly. The code is still untested by me (my
4135 Linux distribution still has 0.3.2 of radiusclient), but it was
4136 contributed by a Radius user.
4138 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4139 expanding the "port" option of the smtp transport.
4141 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4142 while reading a MIME header. Thanks to Tom Hughes for a patch.
4144 PH/24 Include config.h inside local_scan.h so that configuration settings are
4147 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4148 that in an ACL for RCPT (for example), you can examine exactly what was
4151 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4152 commands, but it was not correctly comparing the address with the actual
4153 client host address. Thus, it would show the EHLO address in Received:
4154 header lines when this was not necessary.
4156 PH/27 Added the % operator to ${eval:}.
4158 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4159 it should be ignoring failures (because with -C, for example, it has lost
4160 privilege). It wasn't ignoring creation failures other than "already
4163 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4166 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4167 because an input line was too long, either on its own, or by virtue of
4168 too many continuations, the temporary file was not being removed, and the
4169 return code was incorrect.
4171 PH/31 Missing "BOOL" in function definition in filtertest.c.
4173 PH/32 Applied Sieve patches from the maintainer.
4175 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4177 PH/33 Added "verify = not_blind".
4179 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4180 Local/Makefile (with some defaults set). These are used in built scripts
4181 such as exicyclog, but they have never been used in the exim_install
4182 script (though there are many overriding facilities there). I have
4183 arranged that the exim_install script now takes note of these two
4186 PH/35 Installed configuration files for Dragonfly.
4188 PH/36 When a locally submitted message by a trusted user did not contain a
4189 From: header, and the sender address was obtained from -f or from an SMTP
4190 MAIL command, and the trusted user did not use -F to supply a sender
4191 name, $originator_name was incorrectly used when constructing a From:
4192 header. Furthermore, $originator_name was used for submission mode
4193 messages from external hosts without From: headers in a similar way,
4194 which is clearly wrong.
4196 PH/37 Added control=suppress_local_fixups.
4198 PH/38 When log_selector = +received_sender was set, and the addition of the
4199 sender made the log line's construction buffer exactly full, or one byte
4200 less than full, an overflow happened when the terminating "\n" was
4203 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4204 when the result of a list match is failure because a DNS lookup failed.
4206 PH/40 RM_COMMAND is now used in the building process.
4208 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4209 the "build-* directories that it finds.
4211 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4212 address in a domain literal was a prefix of an interface address.
4214 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4215 when verifying a sender address, unless rewrite_headers is false.
4217 PH/44 Wrote a long comment about why errors_to addresses are verified as
4218 recipients, not senders.
4220 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4221 the ratelimit ACL was added.
4223 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4225 PH/46 Added extra information about PostgreSQL errors to the error string.
4227 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4228 avoiding the need to install special zones in a real server. This is
4229 backwards compatible; if it can't find the fake resolver, it drops back.
4230 Thus, both old and new test suites can be run.
4232 TF/02 Added util/ratelimit.pl
4234 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4235 clock is set back in time.
4237 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4238 Candler <B.Candler@pobox.com>.
4240 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4241 OK for addresses that are the result of redirections.
4243 PH/48 A number of further additions for the benefit of the new test suite,
4244 including a fake gethostbyname() that interfaces to the fake DNS resolver
4247 TF/06 The fix for widen_domains has also been applied to qualify_single and
4248 search_parents which are the other dnslookup options that can cause
4251 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4254 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4256 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4257 service" if it encountered an MX record with an empty target hostname.
4258 The message is now "an MX or SRV record indicated no SMTP service".
4260 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4261 if the DNS of the sending site is misconfigured. This is quite a
4262 common situation. This change restores the behaviour of treating a
4263 helo verification defer as a failure.
4265 PH/51 If self=fail was set on a router, the bounce message did not include the
4266 actual error message.
4272 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4274 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4275 command itself ended in error, the underlying message about the transport
4276 filter timeout was being overwritten with the pipe command error. Now the
4277 underlying error message should be appended to the second error message.
4279 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4281 PH/02 Reduce the amount of output that "make" produces by default. Full output
4282 can still be requested.
4284 PH/03 The warning log line about a condition test deferring for a "warn" verb
4285 was being output only once per connection, rather than after each
4286 occurrence (because it was using the same function as for successful
4287 "warn" verbs). This seems wrong, so I have changed it.
4289 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4290 it should not have, which might have caused a crash in the right
4291 circumstances, but probably never did.
4293 PH/04 Installed a modified version of Tony Finch's patch to make submission
4294 mode fix the return path as well as the Sender: header line, and to
4295 add a /name= option so that you can make the user's friendly name appear
4298 TF/03 Added the control = fakedefer ACL modifier.
4300 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4301 Mark Lowes for thorough testing.
4303 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4305 TK/03 Merged latest SRS patch from Miles Wilton.
4307 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4308 with the definition in sysexits.h (which is #included earlier).
4309 Fortunately, Exim does not actually use EX_OK. The code used to try to
4310 preserve the sysexits.h value, by assuming that macro definitions were
4311 scanned for macro replacements. I have been disabused of this notion,
4312 so now the code just undefines EX_OK before #including unistd.h.
4314 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4315 in the smtp transport. When a block could not be written in a single
4316 write() function, the timeout was being re-applied to each part-write.
4317 This seems wrong - if the receiver was accepting one byte at a time it
4318 would take for ever. The timeout is now adjusted when this happens. It
4319 doesn't have to be particularly precise.
4321 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4322 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4324 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4325 without a domain if the check to <postmaster@domain> fails.
4327 SC/01 Eximstats: added -xls and the ability to specify output files
4328 (patch written by Frank Heydlauf).
4330 SC/02 Eximstats: use FileHandles for outputting results.
4332 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4334 SC/04 Eximstats: fixed display of large numbers with -nvr option
4336 SC/05 Eximstats: fixed merging of reports with empty tables.
4338 SC/06 Eximstats: added the -include_original_destination flag
4340 SC/07 Eximstats: removed tabs and trailing whitespace.
4342 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4344 TK/06 MBOX spool code: Add real "From " MBOX separator line
4345 so the .eml file is really in mbox format (even though
4346 most programs do not really care). Patch from Alex Miller.
4348 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4349 The latter is generated from $received_to and is only set if the
4350 message has one envelope recipient. SA can use these headers,
4351 obviously out-of-the-box. Patch from Alex Miller.
4353 PH/08 The ${def test on a variable was returning false if the variable's
4354 value was "0", contrary to what the specification has always said!
4355 The result should be true unless the variable is empty.
4357 PH/09 The syntax error of a character other than { following "${if
4358 def:variable_name" (after optional whitespace) was not being diagnosed.
4359 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4360 accidental colon was present, for example, could give incorrect results.
4362 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4363 result is used (not including appendfile, where other changes are about
4366 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4367 This involved changing a lot of size variables from int to off_t. It
4368 should work with maildirs and everything.
4370 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4371 spamd dying while we are connected to it.
4373 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4376 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4377 function for BDB 4.3.
4379 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4381 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4382 the sources for PCRE have been re-arranged and more files are now
4385 PH/15 The code I had for printing potentially long long variables in PH/11
4386 above was not the best (it lost precision). The length of off_t variables
4387 is now inspected at build time, and an appropriate printing format (%ld
4388 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4389 to be "long long int" or "long int". This is needed for the internal
4390 formatting function string_vformat().
4392 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4393 the configuration file to be ":syslog", then the script "guesses" where
4394 the logs files are, rather than using the compiled in default. In our
4395 case the guess is not the same as the compiled default, so the script
4396 suddenly stopped working when I started to use syslog. The patch checks
4397 to see if log_file_path is "". If so, it attempts to read it from exim
4398 with no configuration file to get the compiled in version, before it
4399 falls back to the previous guessing code."
4401 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4402 implementing BATV in an Exim configuration. See NewStuff for the gory
4405 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4406 Makefile that are specific to HP-UX.
4408 PH/18 If the "use_postmaster" option was set for a recipient callout together
4409 with the "random" option, the postmaster address was used as the MAIL
4410 FROM address for the random test, but not for the subsequent recipient
4411 test. It is now used for both.
4413 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4414 patch removes a few documentation additions to RFC 3028, because the
4415 latest draft now contains them. It adds the new en;ascii-case comparator
4416 and a new error check for 8bit text in MIME parts. Comparator and
4417 require names are now matched exactly. I enabled the subaddress
4418 extension, but it is not well tested yet (read: it works for me)."
4420 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4421 rework some of the code of TK/09 above to avoid the hardwired use of
4422 "%lld" and "long long". Replaced the call to snprintf() with a call to
4425 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4426 records point to non-existent hosts", "retry timeout exceeded", and
4427 "retry time not reached for any host after a long failure period".
4429 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4430 experimental DomainKeys support:
4432 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4433 (2) On an error such as an illegally used "control", the wrong name for
4434 the control was given.
4436 These problems did NOT occur unless DomainKeys support was compiled.
4438 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4440 PH/24 Added ${if match_ip condition.
4442 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4443 databases so that it will be absolutely obvious if a crash occurs in the
4444 DB library. This is a regular occurrence (often caused by mis-matched
4447 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4448 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4449 picked up on a user's system that detects such things. There doesn't seem
4450 to be a gcc warning option for this - only an attribute that has to be
4451 put on the function's prototype. It seems that in Fedora Core 4 they have
4452 set this on a number of new functions. No doubt there will be more in due
4455 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4456 specify a transport. However, if an address that was verified by such a
4457 router was the subject of a callout, Exim crashed because it tried to
4458 read the rcpt_include_affixes from the non-existent transport. Now it
4459 just assumes that the setting of that option is false. This bug was
4460 introduced by 4.51/PH/31.
4462 PH/28 Changed -d+all to exclude +memory, because that information is very
4463 rarely of interest, but it makes the output a lot bigger. People tend to
4464 do -d+all out of habit.
4466 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4467 code in os-type was giving problems when libc.so lives in lib64, like on
4470 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4471 aren't the modern standard, and it seems that some systems' include files
4472 don't always have them. Exim was already checking for some of the newer
4473 ones like T_AAAA, and defining it itself. I've added checks for all the
4474 record types that Exim uses.
4476 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4477 not automatically generating a new one, as it is supposed to. This
4478 prevented TLS from working. If the file did exist, but contained invalid
4479 data, a new version was generated, as expected. It was only the case of a
4480 non-existent file that was broken.
4482 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4483 with a change in libdomainkeys > 0.64.
4485 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4486 from DNS. If the selector record carries the flag, it now has
4487 precedence over the domain-wide flag.
4489 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4491 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4492 the use of a port name that isn't defined in /etc/services) occurred, the
4493 message was deferred as in a normal delivery, and thus remained on the
4494 spool, instead of being failed because of the mua_wrapper setting. This
4495 is now fixed, and I tidied up some of the mua_wrapper messages at the
4498 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4499 the messages in a hash of arrays rather than using individual hashes.
4500 This is a bit cleaner and results in dramatic memory savings, albeit
4501 at a slight CPU cost.
4503 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4504 as requested by Marc Sherman.
4506 SC/10 Eximstats: added histograms for user specified patterns as requested
4509 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4511 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4512 fopen() in the content-scanning modules that did not already have it.
4518 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4519 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4521 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4523 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4525 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4526 to test Sieve filters that use "vacation".
4528 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4529 that changes the way the GnuTLS parameters are stored in the cache file.
4530 The new format can be generated externally. For backward compatibility,
4531 if the data in the cache doesn't make sense, Exim assumes it has read an
4532 old-format file, and it generates new data and writes a new file. This
4533 means that you can't go back to an older release without removing the
4536 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4537 work if there are any delivery delays because "one_time" forces the
4538 parent to be marked "delivered", so its unseen clone is never tried
4539 again. For this reason, Exim now forbids the simultaneous setting of
4542 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4543 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4544 entry if you want to know the details. The fix, however, neglected to
4545 consider the case when local delivery batching is involved. The test for
4546 "previously delivered" was not happening when checking to see if an
4547 address could be batched with a previous (undelivered) one; under
4548 certain circumstances this could lead to multiple deliveries to the same
4551 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4552 in its include files, and this causes problems building Exim.
4554 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4555 header_syntax) but Exim was just ignoring anything given after a slash.
4556 In particular, this caused confusion with an attempt to use "verify =
4557 reverse_host_lookup/defer_ok". An error is now given when options are
4558 supplied for verify items that do not have them. (Maybe reverse_host_
4559 lookup should have a defer_ok option, but that's a different point.)
4561 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4562 defined by RFC 821) to 2048, because there were problems with some AUTH
4563 commands, and RFC 1869 says the size should be increased for extended
4564 SMTP commands that take arguments.
4566 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4569 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4570 "unknown" error; now it says that the functionality isn't in the binary.
4572 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4573 an address' error message when a string expansion fails (syntax or
4574 whatever). Otherwise the password may appear in the log. Following change
4575 PH/42 below, there is no longer a chance of it appearing in a bounce
4578 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4580 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4581 of its addresses was ever tried. (Bugzilla bug #2.)
4583 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4584 the result incorrectly in the debug output. (It correctly added a newline
4585 to what was transported.)
4587 TF/01 Added $received_time.
4589 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4590 commented out examples of how to interface to a virus scanner and to
4591 SpamAssassin. Also added commented examples of av_scanner and
4592 spamd_address settings.
4594 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4595 and controls are allowed in which ACLs. There were a couple of minor
4596 errors. Some of the entries in the conditions table (which is a table of
4597 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4598 negation of where the condition IS allowed.
4600 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4602 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4603 header file does not have a version number, so I've had to invent a new
4604 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4605 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4606 radiusclient), but it was contributed by a Radius user.
4608 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4609 files or directories, for OpenSSL.
4611 PH/19 When an Exim process that is running as root has to create an Exim log
4612 file, it does so in a subprocess that runs as exim:exim so as to get the
4613 ownership right at creation (otherwise, other Exim processes might see
4614 the file with the wrong ownership). There was no test for failure of this
4615 fork() call, which would lead to the process getting stuck as it waited
4616 for a non-existent subprocess. Forks do occasionally fail when resources
4617 run out. I reviewed all the other calls to fork(); they all seem to check
4620 PH/20 When checking for unexpected SMTP input at connect time (before writing
4621 the banner), Exim was not dealing correctly with a non-positive return
4622 from the read() function. If the client had disconnected by this time,
4623 the result was a log entry for a synchronization error with an empty
4624 string after "input=" when read() returned zero. If read() returned -1
4625 (an event I could not check), uninitialized data bytes were printed.
4626 There were reports of junk text (parts of files, etc) appearing after
4629 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4631 PH/22 Added support for macro redefinition, and (re)definition in between
4632 driver and ACL definitions.
4634 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4635 forgetting to use the resulting value; it was using the unexpanded value.
4637 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4638 hadn't been configured. The fix is from Juergen Kreileder, who
4639 understands it better than I do:
4641 "Here's what I see happening with three configured cyrus_sasl
4642 authenticators configured (plain, login, cram-md5):
4644 On startup auth_cyrus_sasl_init() gets called for each of these.
4645 This means three calls to sasl_listmech() without a specified mech_list.
4646 => SASL tests which mechs of all available mechs actually work
4647 => three warnings about OTP not working
4648 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4650 With the patch, sasl_listmech() also gets called three times. But now
4651 SASL's mech_list option is set to the server_mech specified in the the
4652 authenticator. Or in other words, the answer from sasl_listmech()
4653 gets limited to just the mech you're testing for (which is different
4655 => the return list contains just 'plain' or 'login', 'cram-md5' or
4656 nothing depending on the value of ob->server_mech.
4658 I've just tested the patch: Authentication still works fine,
4659 unavailable mechs specified in the exim configuration are still
4660 caught, and the auth.log warnings about OTP are gone."
4662 PH/25 When debugging is enabled, the contents of the command line are added
4663 to the debugging output, even when log_selector=+arguments is not
4666 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4667 answer is "GNU", and only if the return is "GNU/something" is the answer
4670 PH/27 $acl_verify_message is now set immediately after the failure of a
4671 verification in an ACL, and so is available in subsequent modifiers. In
4672 particular, the message can be preserved by coding like this:
4674 warn !verify = sender
4675 set acl_m0 = $acl_verify_message
4677 Previously, $acl_verify_message was set only while expanding "message"
4678 and "log_message" when a very denied access.
4680 PH/28 Modified OS/os.c-Linux with
4682 -#ifndef OS_LOAD_AVERAGE
4683 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4685 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4686 nomenclature these days.)
4688 PH/29 Installed patch from the Sieve maintainer that adds the options
4689 sieve_useraddress and sieve_subaddress to the redirect router.
4691 PH/30 In these circumstances:
4692 . Two addresses routed to the same list of hosts;
4693 . First host does not offer TLS;
4694 . First host accepts first address;
4695 . First host gives temporary error to second address;
4696 . Second host offers TLS and a TLS session is established;
4697 . Second host accepts second address.
4698 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4699 and peerdn, if requested) that were in fact used only for the second
4702 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4703 attention to any local part prefix or suffix that was matched by the
4704 router that accepted the address. It now behaves in the same way as it
4705 does for delivery: the affixes are removed from the local part unless
4706 rcpt_include_affixes is set on the transport.
4708 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4709 timeout during the DATA phase of an incoming message.
4711 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4712 applied a patch sanctioned by the Sieve maintainer.
4714 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4715 the uid or gid is negative. A case of a negative gid caused this to be
4716 noticed. The fix allows for either to be negative.
4718 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4719 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4722 PH/36 The change PH/12 above was broken. Fixed it.
4724 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4725 the grounds that routing the same address twice would always produce the
4726 same answer. This might have been true once, but it is certainly no
4727 longer true now. Routing a child address may depend on the previous
4728 routing that produced that child. Some complicated redirection strategies
4729 went wrong when messages had multiple recipients, and made Exim's
4730 behaviour dependent on the order in which the addresses were given.
4732 I have moved the duplicate checking until after the routing is complete.
4733 Exim scans the addresses that are assigned to local and remote
4734 transports, and removes any duplicates. This means that more work will be
4735 done, as duplicates will always all be routed, but duplicates are
4736 presumably rare, so I don't expect this is of any significance.
4738 For deliveries to pipes, files, and autoreplies, the duplicate checking
4739 still happens during the routing process, since they are not going to be
4742 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4743 It corrects a timeout issue with spamd. This is Ian's comment: "The
4744 background is that sometimes spamd either never reads data from a
4745 connection it has accepted, or it never writes response data. The exiscan
4746 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4747 blindly assumes that writes won't block so it may never time out."
4749 PH/39 Allow G after quota size as well as K and M.
4751 PH/40 The value set for $authenticated_id in an authenticator may not contain
4752 binary zeroes or newlines because the value is written to log lines and
4753 to spool files. There was no check on this. Now the value is run through
4754 the string_printing() function so that such characters are converted to
4755 printable escape sequences.
4757 PH/41 $message_linecount is a new variable that contains the total number of
4758 lines in the message. Compare $body_linecount, which is the count for the
4761 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4762 bounce and delay warning messages, except in certain special cases, which
4765 (a) An SMTP error message from a remote host;
4766 (b) A message specified in a :fail: redirection;
4767 (c) A message specified in a "fail" command in a system filter;
4768 (d) A message specified in a FAIL return from the queryprogram router;
4769 (e) A message specified by the cannot_route_message router option.
4771 In these cases only, Exim does include the error details in bounce and
4772 warning messages. There are also a few cases where bland messages such
4773 as "unrouteable address" or "local delivery error" are given.
4775 PH/43 $value is now also set for the "else" part of a ${run expansion.
4777 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4778 being worked on, but at least Exim now implements the latest version to
4781 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4782 process to complete was treated as a delivery failure, a timeout while
4783 writing the message to the pipe was logged, but erroneously treated as a
4784 successful delivery. Such timeouts include transport filter timeouts. For
4785 consistency with the overall process timeout, these timeouts are now
4786 treated as errors, giving rise to delivery failures by default. However,
4787 there is now a new Boolean option for the pipe transport called
4788 timeout_defer, which, if set TRUE, converts the failures into defers for
4789 both kinds of timeout. A transport filter timeout is now identified in
4792 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4793 systems where "make" and "gmake" are different, calling "gmake" at top
4794 level broke things. I've arranged for the value of $(MAKE) to be passed
4795 from the Makefile to this script so that it can call the same version of
4799 A note about Exim versions 4.44 and 4.50
4800 ----------------------------------------
4802 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4803 changes of various kinds. As a consequence, a big documentation update was
4804 needed. This delayed the release for rather longer than seemed good, especially
4805 in the light of a couple of (minor) security issues. Therefore, the changes
4806 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4807 release. So 4.44 and 4.50 are in effect two different branches that both start
4810 I have left the 4.50 change log unchanged; it contains all the changes since
4811 4.43. The change log for 4.44 is below; many of its items are identical to
4812 those for 4.50. This seems to be the most sensible way to preserve the
4813 historical information.
4819 1. Minor wording change to the doc/README.SIEVE file.
4821 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4822 computation of the current number of files was incorrect.
4824 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4825 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4828 4. Give more explanation in the error message when the command for a transport
4829 filter fails to execute.
4831 5. There are several places where Exim runs a non-Exim command in a
4832 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4833 was being done only for the command run by the queryprogram router. It is
4834 now done for all such subprocesses. The other cases are: ${run, transport
4835 filters, and the commands run by the lmtp and pipe transports.
4837 6. Added CONFIGURE_GROUP build-time option.
4839 7. Some older OS have a limit of 256 on the maximum number of file
4840 descriptors. Exim was using setrlimit() to set 1000 as a large value
4841 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4842 systems. I've change it so that if it can't get 1000, it tries for 256.
4844 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4845 was an oversight, and furthermore, ever since the addition of extra
4846 controls (e.g. 4.43/32), the checks on when to allow different forms of
4847 "control" were broken. There should now be diagnostics for all cases when a
4848 control that does not make sense is encountered.
4850 9. Added the /retain_sender option to "control=submission".
4852 10. $recipients is now available in the predata ACL (oversight).
4854 11. Tidy the search cache before the fork to do a delivery from a message
4855 received from the command line. Otherwise the child will trigger a lookup
4856 failure and thereby defer the delivery if it tries to use (for example) a
4857 cached ldap connection that the parent has called unbind on.
4859 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4860 of $address_data from the recipient verification was clobbered by the
4861 sender verification.
4863 13. The value of address_data from a sender verification is now available in
4864 $sender_address_data in subsequent conditions in the ACL statement.
4866 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4868 15. Added a new option "connect=<time>" to callout options, to set a different
4871 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4872 was its contents. (It was OK if the option was not defined at all.)
4874 17. A "Completed" log line is now written for messages that are removed from
4875 the spool by the -Mrm option.
4877 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4878 information about exactly what failed.
4880 19. Added -dd to debug only the daemon process.
4882 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4883 handles timeouts, both on the server side and network timeouts. Renamed the
4884 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4886 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4887 It is now set to "smtps".
4889 22. $host_address is now set to the target address during the checking of
4890 ignore_target_hosts.
4892 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4893 being passed; this would have caused $sender_host_name to have been used if
4894 matching the list had actually called for a host name (not very likely,
4895 since this list is usually IP addresses). A host name is now passed as
4898 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4899 code that specifies a non-restarting handler (typically sigaction() in
4900 modern systems) in an attempt to fix a rare and obscure crash bug.
4902 25. Narrowed the window for a race in the daemon that could cause it to ignore
4903 SIGCHLD signals. This is not a major problem, because they are used only to
4904 wake it up if nothing else does.
4906 26. A malformed maildirsize file could cause Exim to calculate negative values
4907 for the mailbox size or file count. Odd effects could occur as a result.
4908 The maildirsize information is now recalculated if the size or filecount
4911 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4912 support for a long time. Removed HAVE_SYS_VFS_H.
4914 28. Installed the latest version of exipick from John Jetmore.
4916 29. In an address list, if the pattern was not a regular expression, an empty
4917 subject address (from a bounce message) matched only if the pattern was an
4918 empty string. Non-empty patterns were not even tested. This was the wrong
4919 because it is perfectly reasonable to use an empty address as part of a
4920 database query. An empty address is now tested by patterns that are
4921 lookups. However, all the other forms of pattern expect the subject to
4922 contain a local part and a domain, and therefore, for them, an empty
4923 address still always fails if the pattern is not itself empty.
4925 30. Exim went into a mad DNS loop when attempting to do a callout where the
4926 host was specified on an smtp transport, and looking it up yielded more
4927 than one IP address.
4929 31. Re-factored the code for checking spool and log partition space into a
4930 function that finds that data and another that does the check. The former
4931 is then used to implement four new variables: $spool_space, $log_space,
4932 $spool_inodes, and $log_inodes.
4934 32. The RFC2047 encoding function was originally intended for short strings
4935 such as real names; it was not keeping to the 75-character limit for
4936 encoded words that the RFC imposes. It now respects the limit, and
4937 generates multiple encoded words if necessary. To be on the safe side, I
4938 have increased the buffer size for the ${rfc2047: expansion operator from
4941 33. It is now permitted to omit both strings after an "if" condition; if the
4942 condition is true, the result is "true". As before, when the second string
4943 is omitted, a false condition yields an empty string. This makes it less
4944 cumbersome to write custom ACL and router conditions.
4946 34. Failure to deliver a bounce message always caused it to be frozen, even if
4947 there was an errors_to setting on the router. The errors_to setting is now
4950 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4951 canonical form (fully expanded) before being placed in
4952 $sender_host_address.
4954 36. The table in the code that translates DNS record types into text (T_A to
4955 "A" for instance) was missing entries for NS and CNAME. It is just possible
4956 that this could have caused confusion if both these types were looked up
4957 for the same domain, because the text type is used as part of Exim's
4958 per-process caching. But the chance of anyone hitting this buglet seems
4961 37. The dnsdb lookup has been extended in a number of ways.
4963 (1) There is a new type, "zns", which walks up the domain tree until it
4964 finds some nameserver records. It should be used with care.
4966 (2) There is a new type, "mxh", which is like "mx" except that it returns
4967 just the host names, not the priorities.
4969 (3) It is now possible to give a list of domains (or IP addresses) to be
4970 looked up. The behaviour when one of the lookups defers can be
4971 controlled by a keyword.
4973 (4) It is now possible to specify the separator character for use when
4974 multiple records are returned.
4976 38. The dnslists ACL condition has been extended: it is now possible to supply
4977 a list of IP addresses and/or domains to be looked up in a particular DNS
4980 39. Added log_selector=+queue_time_overall.
4982 40. When running the queue in the test harness, wait just a tad after forking a
4983 delivery process, to get repeatability of debugging output.
4985 41. Include certificate and key file names in error message when GnuTLS fails
4986 to set them up, because the GnuTLS error message doesn't include the name
4987 of the failing file when there is a problem reading it.
4989 42. Allow both -bf and -bF in the same test run.
4991 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4993 44. The "Exiscan patch" is now merged into the mainline Exim source.
4995 45. Sometimes the final signoff response after QUIT could fail to get
4996 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4997 < 0 before doing a fflush(). This bug looks as though it goes back to the
4998 introduction of TLS in release 3.20, but "sometimes" must have been rare
4999 because the tests only now provoked it.
5001 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5002 (this can affect the format of dates).
5004 47. exim_tidydb, when checking for the continued existence of a message for
5005 which it has found a message-specific retry record, was not finding
5006 messages that were in split spool directories. Consequently, it was
5007 deleting retry records that should have stayed in existence.
5009 48. Steve fixed some bugs in eximstats.
5011 49. The SPA authentication driver was not abandoning authentication and moving
5012 on to the next authenticator when an expansion was forced to fail,
5013 contradicting the general specification for all authenticators. Instead it
5014 was generating a temporary error. It now behaves as specified.
5016 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5017 (the order specifies the preference for clients). The order is now AES256,
5018 AES128, 3DES, ARCFOUR128.
5020 51. Small patch to Sieve code - explicitly set From: when generating an
5023 52. Exim crashed if a remote delivery caused a very long error message to be
5024 recorded - for instance if somebody sent an entire SpamAssassin report back
5025 as a large number of 550 error lines. This bug was coincidentally fixed by
5026 increasing the size of one of Exim's internal buffers (big_buffer) that
5027 happened as part of the Exiscan merge. However, to be on the safe side, I
5028 have made the code more robust (and fixed the comments that describe what
5031 53. Now that there can be additional text after "Completed" in log lines (if
5032 the queue_time_overall log selector is set), a one-byte patch to exigrep
5033 was needed to allow it to recognize "Completed" as not the last thing in
5036 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5037 patch that reportedly fixes this has been added. I am not expert enough to
5038 create a test for it. This is what the patch creator wrote:
5040 "I found a little strange behaviour of ldap code when working with
5041 Windows 2003 AD Domain, where users was placed in more than one
5042 Organization Units. When I tried to give exim partial DN, the exit code
5043 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5044 But simultaneously result of request was absolutely normal ldap result,
5045 so I produce this patch..."
5047 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5048 REFERENCE, so I have modified the code to exclude the patch when that macro
5051 55. Some experimental protocols are using DNS PTR records for new purposes. The
5052 keys for these records are domain names, not reversed IP addresses. The
5053 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5054 leaves it alone. Component reversal etc. now happens only for IP addresses.
5057 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5059 57. Double the size of the debug message buffer (to 2048) so that more of very
5060 long debug lines gets shown.
5062 58. The exicyclog utility now does better if the number of log files to keep
5063 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5065 59. Two changes related to the smtp_active_hostname option:
5067 (1) $smtp_active_hostname is now available as a variable.
5068 (2) The default for smtp_banner uses $smtp_active_hostname instead
5069 of $primary_hostname.
5071 60. The host_aton() function is supposed to be passed a string that is known
5072 to be a valid IP address. However, in the case of IPv6 addresses, it was
5073 not checking this. This is a hostage to fortune. Exim now panics and dies
5074 if the condition is not met. A case was found where this could be provoked
5075 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5076 components; fortuitously, this particular loophole had already been fixed
5077 by change 4.50/55 above.
5079 If there are any other similar loopholes, the new check in host_aton()
5080 itself should stop them being exploited. The report I received stated that
5081 data on the command line could provoke the exploit when Exim was running as
5082 exim, but did not say which command line option was involved. All I could
5083 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5084 running as the user.
5087 61. There was a buffer overflow vulnerability in the SPA authentication code
5088 (which came originally from the Samba project). I have added a test to the
5089 spa_base64_to_bits() function which I hope fixes it.
5092 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5093 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5095 63. The daemon start-up calls getloadavg() while still root for those OS that
5096 need the first call to be done as root, but it missed one case: when
5097 deliver_queue_load_max is set with deliver_drop_privilege. This is
5098 necessary for the benefit of the queue runner, because there is no re-exec
5099 when deliver_drop_privilege is set.
5101 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5102 This has been fixed.
5104 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5105 was in use, was not putting the data itself into the right store pool;
5106 consequently, it could be overwritten for a subsequent message in the same
5107 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5110 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5112 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5113 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5114 the function were treating the return as a boolean value, which happened to
5115 work because 0=false and not-0=true, but is not correct code.
5117 68. The host_aton() function was not handling scoped IPv6 addresses (those
5118 with, for example, "%eth0" on the end) correctly.
5120 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5121 negated items (that is, ~something) in unsigned ints. Some compilers
5122 apparently mutter when there is no cast.
5124 70. If an address verification called from an ACL failed, and did not produce a
5125 user-specific message (i.e. there was only a "system" message), nothing was
5126 put in $acl_verify_message. In this situation, it now puts the system
5129 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5130 session; change 4.31/43 added the unwanted input to the log line - except
5131 that it did not do this in the start of session case. It now does.
5133 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5134 This is wrong and can cause the other end to generate a synchronization
5135 error if it is another Exim or anything else that does the synchronization
5136 check. A QUIT command is no longer sent after a timeout.
5138 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5139 during host lookups.
5141 74. The defer_ok option of callout verification was not working if it was used
5142 when verifying addresses in header lines, that is, for this case:
5144 verify = header_sender/callout=defer_ok
5146 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5147 those file descriptors could be used for SMTP connections. If anything
5148 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5149 could be sent to the SMTP client, causing chaos. The daemon now opens
5150 stdin, stdout, and stderr to /dev/null when it puts itself into the
5153 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5154 log by default. The user can override this with suitable Perl magic.
5156 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5157 the log message when discard triggers, was not working for the DATA ACL or
5158 for the non-SMTP ACL.
5160 78. Error message wording change in sieve.c.
5162 79. If smtp_accept_max_per_host was set, the number of connections could be
5163 restricted to fewer than expected, because the daemon was trying to set up
5164 a new connection before checking whether the processes handling previous
5165 connections had finished. The check for completed processes is now done
5166 earlier. On busy systems, this bug wouldn't be noticed because something
5167 else would have woken the daemon, and it would have reaped the completed
5170 80. If a message was submitted locally by a user whose login name contained one
5171 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5172 It caused a spool format error. I have fixed the spool reading code. A
5173 related problem was that the "from" clause in the Received: line became
5174 illegal because of the space(s). It is now covered by ${quote_local_part.
5176 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5179 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5181 83. Patch from Sieve maintainer to fix unterminated string problem in
5182 "vacation" handling.
5184 84. Some minor changes to the Linux configuration files to help with other
5185 OS variants using glibc.
5187 85. One more patch for Sieve to update vacation handling to latest spec.
5190 ----------------------------------------------------
5191 See the note above about the 4.44 and 4.50 releases.
5192 ----------------------------------------------------
5198 1. Change 4.43/35 introduced a bug that caused file counts to be
5199 incorrectly computed when quota_filecount was set in an appendfile
5202 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5203 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5206 3. Give more explanation in the error message when the command for a transport
5207 filter fails to execute.
5209 4. There are several places where Exim runs a non-Exim command in a
5210 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5211 was being done only for the command run by the queryprogram router. It is
5212 now done for all such subprocesses. The other cases are: ${run, transport
5213 filters, and the commands run by the lmtp and pipe transports.
5215 5. Some older OS have a limit of 256 on the maximum number of file
5216 descriptors. Exim was using setrlimit() to set 1000 as a large value
5217 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5218 systems. I've change it so that if it can't get 1000, it tries for 256.
5220 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5221 was an oversight, and furthermore, ever since the addition of extra
5222 controls (e.g. 4.43/32), the checks on when to allow different forms of
5223 "control" were broken. There should now be diagnostics for all cases when a
5224 control that does not make sense is encountered.
5226 7. $recipients is now available in the predata ACL (oversight).
5228 8. Tidy the search cache before the fork to do a delivery from a message
5229 received from the command line. Otherwise the child will trigger a lookup
5230 failure and thereby defer the delivery if it tries to use (for example) a
5231 cached ldap connection that the parent has called unbind on.
5233 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5234 of $address_data from the recipient verification was clobbered by the
5235 sender verification.
5237 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5238 was its contents. (It was OK if the option was not defined at all.)
5240 11. A "Completed" log line is now written for messages that are removed from
5241 the spool by the -Mrm option.
5243 12. $host_address is now set to the target address during the checking of
5244 ignore_target_hosts.
5246 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5247 being passed; this would have caused $sender_host_name to have been used if
5248 matching the list had actually called for a host name (not very likely,
5249 since this list is usually IP addresses). A host name is now passed as
5252 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5253 code that specifies a non-restarting handler (typically sigaction() in
5254 modern systems) in an attempt to fix a rare and obscure crash bug.
5256 15. Narrowed the window for a race in the daemon that could cause it to ignore
5257 SIGCHLD signals. This is not a major problem, because they are used only to
5258 wake it up if nothing else does.
5260 16. A malformed maildirsize file could cause Exim to calculate negative values
5261 for the mailbox size or file count. Odd effects could occur as a result.
5262 The maildirsize information is now recalculated if the size or filecount
5265 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5266 support for a long time. Removed HAVE_SYS_VFS_H.
5268 18. Updated exipick to current release from John Jetmore.
5270 19. Allow an empty sender to be matched against a lookup in an address list.
5271 Previously the only cases considered were a regular expression, or an
5274 20. Exim went into a mad DNS lookup loop when doing a callout where the
5275 host was specified on the transport, if the DNS lookup yielded more than
5278 21. The RFC2047 encoding function was originally intended for short strings
5279 such as real names; it was not keeping to the 75-character limit for
5280 encoded words that the RFC imposes. It now respects the limit, and
5281 generates multiple encoded words if necessary. To be on the safe side, I
5282 have increased the buffer size for the ${rfc2047: expansion operator from
5285 22. Failure to deliver a bounce message always caused it to be frozen, even if
5286 there was an errors_to setting on the router. The errors_to setting is now
5289 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5290 canonical form (fully expanded) before being placed in
5291 $sender_host_address.
5293 24. Updated eximstats to version 1.33
5295 25. Include certificate and key file names in error message when GnuTLS fails
5296 to set them up, because the GnuTLS error message doesn't include the name
5297 of the failing file when there is a problem reading it.
5299 26. Expand error message when OpenSSL has problems setting up cert/key files.
5302 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5303 (this can affect the format of dates).
5305 28. exim_tidydb, when checking for the continued existence of a message for
5306 which it has found a message-specific retry record, was not finding
5307 messages that were in split spool directories. Consequently, it was
5308 deleting retry records that should have stayed in existence.
5310 29. eximstats updated to version 1.35
5311 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5312 1.35 - bugfix such that pie charts by volume are generated correctly
5314 30. The SPA authentication driver was not abandoning authentication and moving
5315 on to the next authenticator when an expansion was forced to fail,
5316 contradicting the general specification for all authenticators. Instead it
5317 was generating a temporary error. It now behaves as specified.
5319 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5320 (the order specifies the preference for clients). The order is now AES256,
5321 AES128, 3DES, ARCFOUR128.
5323 31. Small patch to Sieve code - explicitly set From: when generating an
5326 32. Exim crashed if a remote delivery caused a very long error message to be
5327 recorded - for instance if somebody sent an entire SpamAssassin report back
5328 as a large number of 550 error lines. This bug was coincidentally fixed by
5329 increasing the size of one of Exim's internal buffers (big_buffer) that
5330 happened as part of the Exiscan merge. However, to be on the safe side, I
5331 have made the code more robust (and fixed the comments that describe what
5334 33. Some experimental protocols are using DNS PTR records for new purposes. The
5335 keys for these records are domain names, not reversed IP addresses. The
5336 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5337 leaves it alone. Component reversal etc. now happens only for IP addresses.
5340 34. The host_aton() function is supposed to be passed a string that is known
5341 to be a valid IP address. However, in the case of IPv6 addresses, it was
5342 not checking this. This is a hostage to fortune. Exim now panics and dies
5343 if the condition is not met. A case was found where this could be provoked
5344 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5345 components; fortuitously, this particular loophole had already been fixed
5346 by change 4.50/55 or 4.44/33 above.
5348 If there are any other similar loopholes, the new check in host_aton()
5349 itself should stop them being exploited. The report I received stated that
5350 data on the command line could provoke the exploit when Exim was running as
5351 exim, but did not say which command line option was involved. All I could
5352 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5353 running as the user.
5356 35. There was a buffer overflow vulnerability in the SPA authentication code
5357 (which came originally from the Samba project). I have added a test to the
5358 spa_base64_to_bits() function which I hope fixes it.
5361 36. The daemon start-up calls getloadavg() while still root for those OS that
5362 need the first call to be done as root, but it missed one case: when
5363 deliver_queue_load_max is set with deliver_drop_privilege. This is
5364 necessary for the benefit of the queue runner, because there is no re-exec
5365 when deliver_drop_privilege is set.
5367 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5368 was in use, was not putting the data itself into the right store pool;
5369 consequently, it could be overwritten for a subsequent message in the same
5370 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5373 38. Sometimes the final signoff response after QUIT could fail to get
5374 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5375 < 0 before doing a fflush(). This bug looks as though it goes back to the
5376 introduction of TLS in release 3.20, but "sometimes" must have been rare
5377 because the tests only now provoked it.
5383 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5384 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5385 Now it returns an integer. A number of calls were still expecting a T/F
5386 return. Fortuitously, in all cases, the tests worked in OK situations,
5387 which is the norm. However, things would have gone wrong on any write
5388 failures on the smtp file descriptor. This function is used when sending
5389 messages over SMTP and also when doing verify callouts.
5391 2. When Exim is called to do synchronous delivery of a locally submitted
5392 message (the -odf or -odi options), it no longer closes stderr before doing
5395 3. Implemented the mua_wrapper option.
5397 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5399 5. Implemented the functions header_remove(), header_testname(),
5400 header_add_at_position(), and receive_remove_recipient(), and exported them
5403 6. If an ACL "warn" statement specified the addition of headers, Exim already
5404 inserted X-ACL-Warn: at the start if there was no header name. However, it
5405 was not making this test for the second and subsequent header lines if
5406 there were newlines in the string. This meant that an invalid header could
5407 be inserted if Exim was badly configured.
5409 7. Allow an ACL "warn" statement to add header lines at the start or after all
5410 the Received: headers, as well as at the end.
5412 8. Added the rcpt_4xx retry error code.
5414 9. Added postmaster_mailfrom=xxx to callout verification option.
5416 10. Added mailfrom=xxxx to the callout verification option, for verify=
5419 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5420 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5422 12. Inserted some casts to stop certain compilers warning when using pointer
5423 differences as field lengths or precisions in printf-type calls (mostly
5424 affecting debugging statements).
5426 13. Added optional readline() support for -be (dynamically loaded).
5428 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5429 same clock tick as a message's arrival, so that its received time was the
5430 same as the "first fail" time on the retry record, and that message
5431 remained on the queue past the ultimate address timeout, every queue runner
5432 would try a delivery (because it was past the ultimate address timeout) but
5433 after another failure, the ultimate address timeout, which should have then
5434 bounced the address, did not kick in. This was a "< instead of <=" error;
5435 in most cases the first failure would have been in the next clock tick
5436 after the received time, and all would be well.
5438 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5439 being recognized when the domain list was tested by the match_domain
5440 condition in an expansion string.
5442 16. Added the ${str2b64: operator.
5444 17. Exim was always calling setrlimit() to set a large limit for the number of
5445 processes, without checking whether the existing limit was already
5446 adequate. (It did check for the limit on file descriptors.) Furthermore,
5447 errors from getrlimit() and setrlimit() were being ignored. Now they are
5448 logged to the main and panic logs, but Exim does carry on, to try to do its
5449 job under whatever limits there are.
5451 18. Imported PCRE 5.0.
5453 19. Trivial typo in log message " temporarily refused connection" (the leading
5456 20. If the log selector return_path_on_delivery was set and an address was
5457 redirected to /dev/null, the delivery process crashed because it assumed
5458 that a return path would always be set for a "successful" delivery. In this
5459 case, the whole delivery is bypassed as an optimization, and therefore no
5462 21. Internal re-arrangement: the function for sending a challenge and reading
5463 a response while authentication was assuming a zero-terminated challenge
5464 string. It's now changed to take a pointer and a length, to allow for
5465 binary data in such strings.
5467 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5469 23. Exim was not respecting finduser_retries when seeking the login of the
5470 uid under which it was called; it was always trying 10 times. (The default
5471 setting of finduser_retries is zero.) Also, it was sleeping after the final
5472 failure, which is pointless.
5474 24. Implemented tls_on_connect_ports.
5476 25. Implemented acl_smtp_predata.
5478 26. If the domain in control=submission is set empty, Exim assumes that the
5479 authenticated id is a complete email address when it generates From: or
5480 Sender: header lines.
5482 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5483 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5484 chown and chgrp in /bin and hostname in /usr/bin.
5486 28. Exim was keeping the "process log" file open after each use, just as it
5487 does for the main log. This opens the possibility of it remaining open for
5488 long periods when the USR1 signal hits a daemon. Occasional processlog
5489 errors were reported, that could have been caused by this. Anyway, it seems
5490 much more sensible not to leave this file open at all, so that is what now
5493 29. The long-running daemon process does not normally write to the log once it
5494 has entered its main loop, and it closes the log before doing so. This is
5495 so that log files can straightforwardly be renamed and moved. However,
5496 there are a couple of unusual error situations where the daemon does write
5497 log entries, and I had neglected to close the log afterwards.
5499 30. The text of an SMTP error response that was received during a remote
5500 delivery was being truncated at 512 bytes. This is too short for some of
5501 the long messages that one sometimes sees. I've increased the limit to
5504 31. It is now possible to make retry rules that apply only when a message has a
5505 specific sender, in particular, an empty sender.
5507 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5508 it possible to be selective about when SMTP synchronization is enforced.
5510 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5512 32. Implemented hosts_connection_nolog.
5514 33. Added an ACL for QUIT.
5516 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5519 35. Added mailbox_size and mailbox_filecount to appendfile.
5521 36. Added control = no_multiline_responses to ACLs.
5523 37. There was a bug in the logic of the code that waits for the clock to tick
5524 in the case where the clock went backwards by a substantial amount such
5525 that the microsecond fraction of "now" was more than the microsecond
5526 fraction of "then" (but the whole seconds number was less).
5528 38. Added support for the libradius Radius client library this is found on
5529 FreeBSD (previously only the radiusclient library was supported).
5535 1. When certain lookups returned multiple values in the form name=value, the
5536 quoting of the values was not always being done properly. Specifically:
5537 (a) If the value started with a double quote, but contained no whitespace,
5539 (b) If the value contained whitespace other than a space character (i.e.
5540 tabs or newlines or carriage returns) it was not quoted.
5541 This fix has been applied to the mysql and pgsql lookups by writing a
5542 separate quoting function and calling it from the lookup code. The fix
5543 should probably also be applied to nisplus, ibase and oracle lookups, but
5544 since I cannot test any of those, I have not disturbed their existing code.
5546 2. A hit in the callout cache for a specific address caused a log line with no
5547 reason for rejecting RCPT. Now it says "Previous (cached) callout
5548 verification failure".
5550 3. There was an off-by-one bug in the queryprogram router. An over-long
5551 return line was truncated at 256 instead of 255 characters, thereby
5552 overflowing its buffer with the terminating zero. As well as fixing this, I
5553 have increased the buffer size to 1024 (and made a note to document this).
5555 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5556 when Exim is waiting for an SMTP response from a remote server, Exim
5557 restarts its select() call on the socket, thereby resetting its timeout.
5558 This is not a problem when such interrupts are rare. Somebody set up a cron
5559 job to run exiwhat every 2 minutes, which is less than the normal select()
5560 timeout (5 or 10 minutes). This meant that the select() timeout never
5561 kicked in because it was always reset. I have fixed this by comparing the
5562 time when an interrupt arrives with the time at the start of the first call
5563 to select(). If more time than the timeout has elapsed, the interrupt is
5564 treated as a timeout.
5566 5. Some internal re-factoring in preparation for the addition of Sieve
5567 extensions (by MH). In particular, the "personal" test is moved to a
5568 separate function, and given an option for scanning Cc: and Bcc: (which is
5569 not set for Exim filters).
5571 6. When Exim created an email address using the login of the caller as the
5572 local part (e.g. when creating a From: or Sender: header line), it was not
5573 quoting the local part when it contained special characters such as @.
5575 7. Installed new OpenBSD configuration files.
5577 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5578 try to make them clearer.
5580 9. Callout options, other than the timeout value, were being ignored when
5581 verifying sender addresses in header lines. For example, when using
5583 verify = header_sender/callout=no_cache
5585 the cache was (incorrectly) being used.
5587 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5588 only the Cygwin environment.
5590 11. When return_path_on_delivery was set as a log selector, if different remote
5591 addresses in the same message used different return paths and parallel
5592 remote delivery occurred, the wrong values would sometimes be logged.
5593 (Whenever a remote delivery process finished, the return path value from
5594 the most recently started remote delivery process was logged.)
5596 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5597 lines when AUTH and/or TLS are in use. This is the "received protocol"
5598 field. Exim used to use "asmtp" for authenticated SMTP, without any
5599 indication (in the protocol name) for TLS use. Now it follows the RFC and
5600 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5601 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5602 names appear in log lines as well as in Received: header lines.
5604 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5605 extensions, and comparison tests, and to fix some bugs.
5607 14. Changes to the "personal" filter test:
5609 (1) The test was buggy in that it was just doing the equivalent of
5610 "contains" tests on header lines. For example, if a user's address was
5611 anne@some.where, the "personal" test would incorrectly be true for
5613 To: susanne@some.where
5615 This test is now done by extracting each address from the header in turn,
5616 and checking the entire address. Other tests that are part of "personal"
5617 are now done using regular expressions (for example, to check local parts
5618 of addresses in From: header lines).
5620 (2) The list of non-personal local parts in From: addresses has been
5621 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5622 taken from the Sieve specification recommendations.
5624 (3) If the message contains any header line starting with "List-" it is
5625 treated as non-personal.
5627 (4) The test for "circular" in the Subject: header line has been removed
5628 because it now seems ill-conceived.
5630 15. Minor typos in src/EDITME comments corrected.
5632 16. Installed latest exipick from John Jetmore.
5634 17. If headers_add on a router specified a text string that was too long for
5635 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5636 of string_sprintf() is now avoided.
5638 18. $message_body_size was not set (it was always zero) when running the DATA
5639 ACL and the local_scan() function.
5641 19. For the "mail" command in an Exim filter, no default was being set for
5642 the once_repeat time, causing a random time value to be used if "once" was
5643 specified. (If the value happened to be <= 0, no repeat happened.) The
5644 default is now 0s, meaning "never repeat". The "vacation" command was OK
5645 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5646 (I found it when inspecting the code).
5648 20. There is now an overall timeout for performing a callout verification. It
5649 defaults to 4 times the callout timeout, which applies to individual SMTP
5650 commands during the callout. The overall timeout applies when there is more
5651 than one host that can be tried. The timeout is checked before trying the
5652 next host. This prevents very long delays if there are a large number of
5653 hosts and all are timing out (e.g. when the network connections are timing
5654 out). The value of the overall timeout can be changed by specifying an
5655 additional sub-option for "callout", called "maxwait". For example:
5657 verify = sender/callout=5s,maxwait=20s
5659 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5660 to the end before writing, but this should make it even safer).
5662 22. Exim was forgetting that it had advertised PIPELINING for the second and
5663 subsequent messages on an SMTP connection. It was also not resetting its
5664 memory on STARTTLS and an internal HELO.
5666 23. When Exim logs an SMTP synchronization error within a session, it now
5667 records whether PIPELINING has been advertised or not.
5669 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5670 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5671 rather than long int.
5673 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5675 26. Added the never_mail option to autoreply.
5681 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5682 crash if the getsockname() call failed; this can happen if a connection is
5683 closed very soon after it is established. The problem was simply in the
5684 order in which certain operations were done, causing Exim to try to write
5685 to the SMTP stream before it had set up the file descriptor. The bug has
5686 been fixed by making things happen in the correct order.
5692 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5693 before the connection was closed, thus losing the rejection response.
5695 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5696 some early Solaris releases, but causes trouble in current releases where
5697 socklen_t is defined.
5699 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5702 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5705 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5706 that releasing the top of it at the end releases what was used for sub-
5707 expansions (unless the block got too big). However, discard this block if
5708 the first thing is a variable or header, so that we can use its block when
5709 it is dynamic (useful for very large $message_headers, for example).
5711 6. Lookups now cache *every* query, not just the most recent. A new, separate
5712 store pool is used for this. It can be recovered when all lookup caches are
5713 flushed. Lookups now release memory at the end of their result strings.
5714 This has involved some general refactoring of the lookup sources.
5716 7. Some code has been added to the store_xxx() functions to reduce the amount
5717 of flapping under certain conditions.
5719 8. log_incoming_interface used to affect only the <= reception log lines. Now
5720 it causes the local interface and port to be added to several more SMTP log
5721 lines, for example "SMTP connection from", and rejection lines.
5723 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5725 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5727 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5728 could be overwritten at the end of the current message (or the start of a
5729 new message if it was set in a HELO ACL). The value is now preserved for
5730 the duration of the SMTP connection.
5732 12. If a transport had a headers_rewrite setting, and a matching header line
5733 contained an unqualified address, that address was qualified, even if it
5734 did not match any rewriting rules. The underlying bug was that the values
5735 of the flags that permit the existence of unqualified sender and recipient
5736 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5737 non-local messages, and by -bnq for local messages) were not being
5738 preserved with the message after it was received.
5740 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5741 "next input=" as part of the text comprising the host identity instead of
5742 the correct text. The code was using the same buffer for two different
5743 strings. However, depending on which order the printing function evaluated
5744 its arguments, the bug did not always show up. Under Linux, for example, my
5745 test suite worked just fine.
5747 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5748 doesn't work with some older versions of Perl. It has been changed to "my",
5749 which in any case is probably the better facility to use.
5751 15. A really picky compiler found some instances of statements for creating
5752 error messages that either had too many or two few arguments for the format
5755 16. The size of the buffer for calls to the DNS resolver has been increased
5756 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5757 for addresses that have a lot of PTR records. This alleviates a problem; it
5758 does not fully solve it.
5760 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5761 buffer now truncates the list and logs the incident, which is the same
5762 action as happens when Exim is looking up a host name and its aliases.
5763 Previously in this situation something unpredictable would happen;
5764 sometimes it was "internal error: store_reset failed".
5766 18. If a server dropped the connection unexpectedly when an Exim client was
5767 using GnuTLS and trying to read a response, the client delivery process
5768 crashed while trying to generate an error log message.
5770 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5771 string, for example:
5773 warn message = H1: something\nH2: something
5775 the text was added as a single header line from Exim's point of view
5776 though it ended up OK in the delivered message. However, searching for the
5777 second and subsequent header lines using $h_h2: did not work. This has been
5778 fixed. Similarly, if a system filter added multiple headers in this way,
5779 the routers could not see them.
5781 20. Expanded the error message when iplsearch is called with an invalid key to
5782 suggest using net-iplsearch in a host list.
5784 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5785 ACLs are no longer actually imposed (and a message to that effect is
5788 22. If a "gecos" field in a passwd entry contained escaped characters, in
5789 particular, if it contained a \" sequence, Exim got it wrong when building
5790 a From: or a Sender: header from that name. A second bug also caused
5791 incorrect handling when an unquoted " was present following a character
5792 that needed quoting.
5794 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5795 was not being matched caselessly.
5797 24. Arranged for all hyphens in the exim.8 source to be escaped with
5800 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5801 properly. Recipient callout cache records were still being keyed to include
5802 the sender, even when use_sender was set false. This led to far more
5803 callouts that were necessary. The sender is no longer included in the key
5804 when use_sender is false.
5806 26. Added "control = submission" modifier to ACLs.
5808 27. Added the ${base62d: operator to decode base 62 numbers.
5810 28. dnsdb lookups can now access SRV records.
5812 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5813 the configuration file.
5815 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5816 (-v) mode. This makes the output for a verbose queue run more intelligible.
5818 31. Added a use_postmaster feature to recipient callouts.
5820 32. Added the $body_zerocount variable, containing the number of binary zero
5821 bytes in the message body.
5823 33. The time of last modification of the "new" subdirectory is now used as the
5824 "mailbox time last read" when there is a quota error for a maildir
5827 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5829 35. Added +ignore_unknown as a special item in host lists.
5831 36. Code for decoding IPv6 addresses in host lists is now included, even if
5832 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5833 address was recognized as an IP address, but was then not correctly decoded
5834 into binary, causing unexpected and incorrect effects when compared with
5841 1. Very minor rewording of debugging text in manualroute to say "list of
5842 hosts" instead of "hostlist".
5844 2. If verify=header_syntax was set, and a header line with an unqualified
5845 address (no domain) and a large number of spaces between the end of the
5846 name and the colon was received, the reception process suffered a buffer
5847 overflow, and (when I tested it) crashed. This was caused by some obsolete
5848 code that should have been removed. The fix is to remove it!
5850 3. When running in the test harness, delay a bit after writing a bounce
5851 message to get a bit more predictability in the log output.
5853 4. Added a call to search_tidyup() just before forking a reception process. In
5854 theory, someone could use a lookup in the expansion of smtp_accept_max_
5855 per_host which, without the tidyup, could leave open a database connection.
5857 5. Added the variables $recipient_data and $sender_data which get set from a
5858 lookup success in an ACL "recipients" or "senders" condition, or a router
5859 "senders" option, similar to $domain_data and $local_part_data.
5861 6. Moved the writing of debug_print from before to after the "senders" test
5864 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5865 problems for message scanning, either using a data ACL, or using
5866 local_scan() because the Received: header was not generated till after they
5867 were called (in order to set the time as the time of reception completion).
5868 I have revised the way this works. The header is now generated after the
5869 body is received, but before the ACL or local_scan() are called. After they
5870 are run, the timestamp in the header is updated.
5876 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5877 before starting a queue runner without re-exec. This happened only when
5878 deliver_drop_privilege was set or when the Exim user was set to root. The
5879 effect of the bug was that timeouts during subsequent deliveries caused
5880 crashes instead of being properly handled. The handler is now left at its
5881 default (and expected) setting.
5883 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5884 message, again when deliver_drop_privilege is set or Exim is run as root.
5885 The bug described in (1) was not present in this case, but the tidying up
5886 of the other signals was missing. I have made the two cases consistent.
5888 3. The ignore_target_hosts setting on a manualroute router was being ignored
5889 for hosts that were looked up using the /MX notation.
5891 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5894 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5895 operated on the sender address. After changing the $sender_address to <>
5896 for the sender address verify, Exim was re-instated it as the original
5897 (before rewriting) address, but remembering that it had rewritten it, so it
5898 wasn't rewriting it again. This bug also had the effect of breaking the
5899 sender address verification caching when the sender address was rewritten.
5901 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5902 This has been changed so that if the ip literal address matches
5903 ignore_target_hosts, the router declines.
5905 7. Added expansion conditions match_domain, match_address, and match_local_
5906 part (NOT match_host).
5908 8. The placeholder for the Received: header didn't have a length field set.
5910 9. Added code to Exim itself and to exim_lock to test for a specific race
5911 condition that could lead to file corruption when using MBX delivery. The
5912 issue is with the lockfile that is created in /tmp. If this file is removed
5913 after a process has opened it but before that process has acquired a lock,
5914 there is the potential for a second process to recreate the file and also
5915 acquire a lock. This could lead to two Exim processes writing to the file
5916 at the same time. The added code performs the same test as UW imapd; it
5917 checks after acquiring the lock that its file descriptor still refers to
5918 the same named file.
5920 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5921 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5924 11. Added the smtp_active_hostname option. If used, this will typically be made
5925 to depend on the incoming interface address. Because $interface_address is
5926 not set up until the daemon has forked a reception process, error responses
5927 that can happen earlier (such as "too many connections") no longer contain
5930 12. If an expansion in a condition on a "warn" statement fails because a lookup
5931 defers, the "warn" statement is abandoned, and the next ACL statement is
5932 processed. Previously this caused the whole ACL to be aborted.
5934 13. Added the iplsearch lookup type.
5936 14. Added ident_timeout as a log selector.
5938 15. Added tls_certificate_verified as a log selector.
5940 16. Added a global option tls_require_ciphers (compare the smtp transport
5941 option of the same name). This controls incoming TLS connections.
5943 17. I finally figured out how to make tls_require_ciphers do a similar thing
5944 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5945 before starting the TLS session.
5947 18. Tabs are now shown as \t in -bP output.
5949 19. If the log selector return_path_on_delivery was set, Exim crashed when
5950 bouncing a message because it had too many Received: header lines.
5952 20. If two routers both had headers_remove settings, and the first one included
5953 a superfluous trailing colon, the final name in the first list and the
5954 first name in the second list were incorrectly joined into one item (with a
5955 colon in the middle).
5961 1. Added -C and -D options to the exinext utility, mainly to make it easier
5962 to include in the automated testing, but these could be helpful when
5963 multiple configurations are in use.
5965 2. The exinext utility was not formatting the output nicely when there was
5966 an alternate port involved in the retry record key, nor when there was a
5967 message id as well (for retries that were specific to a specific message
5968 and a specific host). It was also confused by IPv6 addresses, because of
5969 the additional colons they contain. I have fixed the IPv4 problem, and
5970 patched it up to do a reasonable job for IPv6.
5972 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5973 delivery, the log line now contains "pipelined" if PIPELINING was used.
5975 4. An SMTP transport process used to panic and die if the bind() call to set
5976 an explicit outgoing interface failed. This has been changed; it is now
5977 treated in the same way as a connect() failure.
5979 5. A reference to $sender_host_name in the part of a conditional expansion
5980 that was being skipped was still causing a DNS lookup. This no longer
5983 6. The def: expansion condition was not recognizing references to header lines
5984 that used bh_ and bheader_.
5986 7. Added the _cache feature to named lists.
5988 8. The code for checking quota_filecount in the appendfile transport was
5989 allowing one more file than it should have been.
5991 9. For compatibility with Sendmail, the command line option
5999 and sets the incoming protocol and host name (for trusted callers). The
6000 host name and its colon can be omitted when only the protocol is to be set.
6001 Note the Exim already has two private options, -pd and -ps, that refer to
6002 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6003 "s", but I don't think that's a major issue.
6005 10. A number of refactoring changes to the code, none of which should affect
6008 (a) The number of logging options was getting close to filling up the
6009 32-bit word that was used as a bit map. I have split them into two classes:
6010 those that are passed in the argument to log_write(), and those that are
6011 only ever tested independently outside of that function. These are now in
6012 separate 32-bit words, so there is plenty of room for expansion again.
6013 There is no change in the user interface or the logging behaviour.
6015 (b) When building, for example, log lines, the code previously used a
6016 macro that called string_cat() twice, in order to add two strings. This is
6017 not really sufficiently general. Furthermore, there was one instance where
6018 it was actually wrong because one of the argument was used twice, and in
6019 one call a function was used. (As it happened, calling the function twice
6020 did not affect the overall behaviour.) The macro has been replaced by a
6021 function that can join an arbitrary number of extra strings onto a growing
6024 (c) The code for expansion conditions now uses a table and a binary chop
6025 instead of a serial search (which was left over from when there were very
6026 few conditions). Also, it now recognizes conditions like "pam" even when
6027 the relevant support is not compiled in: a suitably worded error message is
6028 given if an attempt is made to use such a condition.
6030 11. Added ${time_interval:xxxxx}.
6032 12. A bug was causing one of the ddress fields not to be passed back correctly
6033 from remote delivery subprocesses. The field in question was not being
6034 subsequently used, so this caused to problems in practice.
6036 13. Added new log selectors queue_time and deliver_time.
6038 14. Might have fixed a bug in maildirsizefile handling that threw up
6039 "unexpected character" debug warnings, and recalculated the data
6040 unnecessarily. In any case, I expanded the warning message to give more
6043 15. Added the message "Restricted characters in address" to the statements in
6044 the default ACL that block characters like @ and % in local parts.
6046 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6047 Three changes have been made:
6049 (a) There was a serious bug; a negative response to MAIL caused the whole
6050 recipient domain to be cached as invalid, thereby blocking all messages
6051 to all local parts at the same domain, from all senders. This bug has
6052 been fixed. The domain is no longer cached after a negative response to
6053 MAIL if the sender used is not empty.
6055 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6058 (c) A new callout option, "use_sender" has been added for people who want
6059 the modified behaviour.
6065 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6068 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6069 indeed breaks things for older releases.
6071 3. Added additional logging to the case where there is a problem reading data
6072 from a filter that is running in a subprocess using a pipe, in order to
6073 try to track down a specific problem.
6075 4. Testing facility fudge: when running in the test harness and attempting
6076 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6077 getting "No route to host". Convert this to a timeout.
6079 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6082 6. Some OS don't have socklen_t but use size_t instead. This affects the
6083 fifth argument of getsockopt() amongst other things. This is now
6084 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6085 can be set for individual OS. I have set it for SunOS5, OSF1, and
6086 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6087 some earlier ones do not.
6089 7. Change 4.30/15 was not doing the test caselessly.
6091 8. The standard form for an IPv6 address literal was being rejected by address
6092 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6093 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6094 this, as well as the form without the "IPv6" on the front (but only when
6095 address literals are enabled, of course).
6097 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6099 10. Exim crashed if a message with an empty sender address specified by -f
6100 encountered a router with an errors_to setting. This could be provoked only
6101 by a command such as
6105 where an empty string was supplied; "<>" did not hit this bug.
6107 11. Installed PCRE release 4.5.
6109 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6110 remained set. It is now erased.
6112 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6113 times from message ids (which are base 36 rather than the normal 62).
6115 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6116 were being counted as actual protocol errors, and logged if the log
6117 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6118 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6119 and DATA following a set of rejected RCPTs do not count as protocol errors.
6120 In other words, Exim assumes they were pipelined, though this may not
6121 actually be the case. Of course, in all cases the client gets an
6122 appropriate error code.
6124 15. If a lookup fails in an ACL condition, a message about the failure may
6125 be available; it is used if testing the ACL cannot continue, because most
6126 such messages specify what the cause of the deferral is. However, some
6127 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6128 that caused an old message to be retained and used if a later statement
6129 caused a defer, replacing the real cause of the deferral.
6131 16. If an IP address had so many PTR records that the DNS lookup buffer
6132 was not large enough to hold them, Exim could crash while trying to process
6133 the truncated data. It now detects and logs this case.
6135 17. Further to 4.21/58, another change has been made: if (and only if) the
6136 first line of a message (the first header line) ends with CRLF, a bare LF
6137 in a subsequent header line has a space inserted after it, so as not to
6138 terminate the header.
6140 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6141 unnecessarily, used atoi() instead of strtol(), and didn't check the
6142 termination when getting file sizes from file names by regex.
6144 19. Completely re-implemented the support for maildirsize files, in the light
6145 of a number of problems with the previous contributed implementation
6146 (4.30/29). In particular:
6148 . If the quota is zero, the maildirsize file is maintained, but no quota is
6151 . If the maildir directory does not exist, it is created before any attempt
6152 to write a maildirsize file.
6154 . The quota value in the file is just a cache; if the quota is changed in
6155 the transport, the new value overrides.
6157 . A regular expression is available for excluding directories from the
6160 20. The autoreply transport checks the characters in options that define the
6161 message's headers; it allows continued headers, but it was checking with
6162 isspace() after an embedded newline instead of explicitly looking for a
6165 21. If all the "regular" hosts to which an address was routed had passed their
6166 expiry times, and had not reached their retry times, the address was
6167 bounced, even if fallback hosts were defined. Now Exim should go on to try
6170 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6171 equivalent code in the SMTP transport. Some hosts send humungous responses
6172 to HELO/EHLO, more than 1024 it seems.
6174 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6175 gives compiler warnings in some environments. I've now done it "properly",
6178 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6179 (because of problems with the built-in one) was declared to return uschar *
6180 instead of char *, causing compiler failure.
6182 25. Fixed a file descriptor leak when processing alias/forward files.
6184 26. Fixed a minor format string issue in dbfn.c.
6186 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6188 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6189 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6192 29. When a sender address is verified, it is cached, to save repeating the test
6193 when there is more than one recipient in a message. However, when the
6194 verification involves a callout, it is possible for different callout
6195 options to be set for different recipients. It is too complicated to keep
6196 track of this in the cache, so now Exim always runs a verification when a
6197 callout is required, relying on the callout cache for the optimization.
6198 The overhead is duplication of the address routing, but this should not be
6201 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6202 to be verified with callout=postmaster, and the main callout worked but the
6203 postmaster check failed, the verification correctly failed. However, if a
6204 subsequent RCPT command asked for sender verification *without* the
6205 postmaster check, incorrect caching caused this verification also to fail,
6208 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6209 it was not caching the DNS options (qualify_single, search_parents) that
6210 were used when the lookup failed. A subsequent lookup with different
6211 options therefore always gave the same answer, though there were cases
6212 where it should not have. (Example: a "domains = !$mx_any" option on a
6213 dnslookup router: the "domains" option is always processed without any
6214 widening, but the router might have qualify_single set.) Now Exim uses the
6215 cached value only when the same options are set.
6217 32. Added John Jetmore's "exipick" utility to the distribution.
6219 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6220 than a timeout (e.g. a certificate is required, and is not provided), an
6221 Exim server now closes the connection immediately. Previously it waited for
6222 the client to close - but if the client is SSL, it seems that they each
6223 wait for each other, leading to a delay before one of them times out.
6225 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6226 maintained 0.8.x compatibility because I don't think many are using it, and
6227 it is clearly obsolete.
6229 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6232 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6233 client certificate was expired. A simple patch fixes this, though I don't
6234 understand the full logic of why the verify callback is called multiple
6237 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6238 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6239 which causes problems with some clients (such as the Certicom SSL Plus
6240 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6241 disables the coutermeasure allowing Eudora to connect."
6243 38. Exim was not checking that a write() to a log file succeeded. This could
6244 lead to Bad Things if a log got too big, in particular if it hit a file
6245 size limit. Exim now panics and dies if it cannot write to a log file, just
6246 as it does if it cannot open a log file.
6248 39. Modified OS/Makefile-Linux so that it now contains
6250 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6252 The two -D definitions ensure that Exim is compiled with large file
6253 support, which makes it possible to handle log files that are bigger than
6256 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6257 instance) a domain was checked against a named list that involved a lookup,
6258 causing $domain_data to be set, then another domain was checked against the
6259 same list, then the first domain was re-checked, the value of $domain_data
6260 after the final check could be wrong. In particular, if the second check
6261 failed, it could be set empty. This bug probably also applied to
6264 41. The strip_trailing_dot option was not being applied to the address given
6265 with the -f command-line option.
6267 42. The code for reading a message's header from the spool was incrementing
6268 $received_count, but never initializing it. This meant that the value was
6269 incorrect (doubled) while delivering a message in the same process in which
6270 it was received. In the most common configuration of Exim, this never
6271 happens - a fresh exec is done - but it can happen when
6272 deliver_drop_privilege is set.
6274 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6275 it now includes up to 150 characters of the unexpected data in the log
6278 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6279 and building data strings. The size of both of these buffers was 10 000
6280 bytes - far larger than anybody would *ever* want, thought I. Needless to
6281 say, somebody hit the limit. I have increased the maximum line length to
6282 20 000 and the maximum data length of concatenated lines to 100 000. I have
6283 also fixed two bugs, because there was no checking on these buffers. Tsk,
6284 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6285 buffer is too small.
6287 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6288 lsearch lookups. Now it does.
6290 46. When parsing a route_list item in a manualroute router, a fixed-length
6291 buffer was used for the list of hosts. I made this 1024 bytes long,
6292 thinking that nobody would ever have a list of hosts that long. Wrong.
6293 Somebody had a whole pile of complicated expansion conditions, and the
6294 string was silently truncated, leading to an expansion error. It turns out
6295 that it is easier to change to an unlimited length (owing to other changes
6296 that have happened since this code was originally written) than to build
6297 structure for giving a limitation error. The length of the item that
6298 expands into the list of hosts is now unlimited.
6300 47. The lsearch lookup could not handle data where the length of text line was
6301 more than 4095 characters. Such lines were truncated, leading to shortened
6302 data being returned. It should now handle lines of any length.
6304 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6305 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6308 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6309 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6310 no longer happens in comment lines. A list of replacements is now placed
6311 at the head of all of the source files, except those whose only change is
6312 to replace PERL_COMMAND in the very first #! line.
6314 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6315 messages on the queue, with a bottom-up merge sort, using code contributed
6316 by Michael Haardt. This should make operations like -bp somewhat faster on
6317 large queues. It won't affect queue runners, except when queue_run_in_order
6320 51. Installed eximstats 1.31 in the distribution.
6322 52. Added support for SRV lookups to the dnslookup router.
6324 53. If an ACL referred to $message_body or $message_body_end, the value was not
6325 reset for any messages that followed in the same SMTP session.
6327 54. The store-handling optimization for building very long strings was not
6328 differentiating between the different store pools. I don't think this
6329 actually made any difference in practice, but I've tidied it.
6331 55. While running the routers to verify a sender address, $sender_address
6332 was still set to the sender address. This is wrong, because when routing to
6333 send a bounce to the sender, it would be empty. Therefore, I have changed
6334 it so that, while verifying a sender address, $sender_address is set to <>.
6335 (There is no change to what happens when verifying a recipient address.)
6337 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6338 target A or AAAA records (if not already returned) without resetting the
6339 qualify_single or search_parents options of the DNS resolver. These are
6340 inappropriate in this case because the targets of MX and SRV records must
6341 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6342 target that, when qualified, matched something in the local domain. These
6343 two options are now turned off when doing these lookups.
6345 57. It seems that at least some releases of Reiserfs (which does not have the
6346 concept of a fixed number of inodes) returns zero and not -1 for the
6347 number of available inodes. This interacted badly with check_spool_inodes,
6348 which assumed that -1 was the "no such thing" setting. What I have done is
6349 to check that the total number of inodes is greater than zero before doing
6350 the test of how many are available.
6352 58. When a "warn" ACL statement has a log_message modifier, the message is
6353 remembered, and not repeated. This is to avoid a lot of repetition when a
6354 message has many recipients that cause the same warning to be written.
6355 However, Exim was preserving the list of already written lines for an
6356 entire SMTP session, which doesn't seem right. The memory is now reset if a
6357 new message is started.
6359 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6360 debugging output unless log_rewrite was also set.
6362 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6363 of (int)(handle) when we know that handle contains (void *)(-1).
6365 61. The Exim daemon panic-logs an error return when it closes the incoming
6366 connection. However "connection reset by peer" seems to be common, and
6367 isn't really an error worthy of noting specially, so that particular error
6370 62. When Exim is trying to find all the local interfaces, it used to panic and
6371 die if the ioctl to get the interface flags failed. However, it seems that
6372 on at least one OS (Solaris 9) it is possible to have an interface that is
6373 included in the list of interfaces, but for which you get a failure error
6374 for this call. This happens when the interface is not "plumbed" into a
6375 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6376 failure of the "get flags" call assumes that the interface is down.
6378 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6379 makes life easier for people who are doing arithmetic on fields extracted
6380 from dates, where you often get leading zeros that should not be
6381 interpreted as octal.
6383 64. Added qualify_domain to the redirect router, to override the global
6386 65. If a pathologically long header line contained very many addresses (the
6387 report of this problem mentioned 10 000) and each of them was rewritten,
6388 Exim could use up a very large amount of memory. (It kept on making new
6389 copies of the header line as it rewrote, and never released the old ones.)
6390 At the expense of a bit more processing, the header rewriting function has
6391 been changed so that it no longer eats memory in this way.
6393 66. The generation of the Received: header has been moved from the time that a
6394 message starts to be received, to the time that it finishes. The timestamp
6395 in the Received: header should now be very close to that of the <= log
6396 line. There are two side-effects of this change:
6398 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6399 logged header lines no longer include the local Received: line, because
6400 it has not yet been created. The same applies to a copy of the message
6401 that is returned to a non-SMTP sender when a message is rejected.
6403 (b) When a filter file is tested using -bf, no additional Received: header
6404 is added to the test message. After some thought, I decided that this
6407 This change does not affect the value of $received_for. It is still set
6408 after address rewriting, but before local_scan() is called.
6410 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6412 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6413 gave an unhelpful panic error message, and a defer error. I have managed to
6414 change this behaviour so that it now rejects any supplied certificate,
6415 which seems right, as the list of acceptable certificates is empty.
6417 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6418 gave an unhelpful defer error. I have not managed to make this reject any
6419 supplied certificates, but the error message it gives is "no certificate
6420 supplied", which is not helpful.
6422 70. exigrep's output now also includes lines that are not associated with any
6423 message, but which match the given pattern. Implemented by a patch from
6424 Martin Sluka, which also tidied up the Perl a bit.
6426 71. Recipient callout verification, like sender verification, was using <> in
6427 the MAIL FROM command. This isn't really the right thing, since the actual
6428 sender may affect whether the remote host accepts the recipient or not. I
6429 have changed it to use the actual sender in the callout; this means that
6430 the cache record is now keyed on a recipient/sender pair, not just the
6431 recipient address. There doesn't seem to be a real danger of callout loops,
6432 since a callout by the remote host to check the sender would use <>.
6433 [SEE ABOVE: changed after hitting problems.]
6435 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6436 temporary errors. However, in the case of such a code being given after
6437 the end of a data transmission (i.e. after ".") Exim was failing to write
6438 a retry record for the message. (Yes, there was some broken host that was
6439 actually sending 8xx at this point.)
6441 73. An unknown lookup type in a host list could cause Exim to panic-die when
6442 the list was checked. (An example that provoked this was putting <; in the
6443 middle of a list instead of at the start.) If this happened during a DATA
6444 ACL check, a -D file could be left lying around. This kind of configuration
6445 error no longer causes Exim to die; instead it causes a defer error. The
6446 incident is still logged to the main and panic logs.
6448 74. Buglet left over from Exim 3 conversion. The message "too many messages
6449 in one connection" was written to the rejectlog but not the mainlog, except
6450 when address rewriting (yes!) was being logged.
6452 75. Added write_rejectlog option.
6454 76. When a system filter was run not as root (that is, when system_filter_user
6455 was set), the values of the $n variables were not being returned to the
6456 main process; thus, they were not subsequently available in the $sn
6459 77. Added +return_path_on_delivery log selector.
6461 78. A connection timeout was being treated differently from recipients deferred
6462 when testing hosts_max_try with a message that was older than the host's
6463 retry timeout. (The host should not be counted, thus allowing all hosts to
6464 be tried at least once before bouncing.) This may have been the cause of an
6465 occasionally reported bug whereby a message would remain on the queue
6466 longer than the retry timeout, but would be bounced if a delivery was
6467 forced. I say "may" because I never totally pinned down the problem;
6468 setting up timeout/retry tests is difficult. See also the next item.
6470 79. The ultimate address timeout was not being applied to errors that involved
6471 a combination of host plus message (for example, a timeout on a MAIL
6472 command). When an address resolved to a number of possible hosts, and they
6473 were not all tried for each delivery (e.g. because of hosts_max_try), a
6474 message could remain on the queue longer than the retry timeout.
6476 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6479 81. Fixed an obscure SMTP outgoing bug which required at least the following
6480 conditions: (a) there was another message waiting for the same server;
6481 (b) the server returned 5xx to all RCPT commands in the first message so
6482 that the message was not completed; (c) the server dropped the connection
6483 or gave a negative response to the RSET that Exim sends to abort the
6484 transaction. The observed case was a dropped connection after DATA that had
6485 been sent in pipelining mode. That is, the server had advertised PIPELINING
6486 but was not implementing it correctly. The effect of the bug was incorrect
6487 behaviour, such as trying another host, and this could lead to a crash.
6493 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6494 and daemon.c were passed as pointers to ints; they should have been
6495 pointers to socklen_t variables (which are typically unsigned ints).
6497 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6500 3. Fixed a really odd bug that affected only the testing scheme; patching a
6501 certain fixed string in the binary changed the value of another string that
6502 happened to be identical to the end of the original first string.
6504 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6505 name", it returns that address as the IP address. On some operating
6506 systems (e.g. Solaris), it also passes back the IP address string as the
6507 "host name". However, on others (e.g. Linux), it passes back an empty
6508 string. Exim wasn't checking for this, and was changing the host name to an
6509 empty string, assuming it had been canonicalized.
6511 5. Although rare, it is permitted to have more than one PTR record for a given
6512 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6513 all the names associated with an address, because they do in Solaris.
6514 However, it seems that they do not in Linux for data that comes from the
6515 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6516 I found this out when I moved to a new Linux workstation and tried to run
6517 the Exim test suite.
6519 To get round this problem I have changed the code so that it now does its
6520 own call to the DNS to look up PTR records when searching for a host name.
6521 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6522 addresses that are only in /etc/hosts are still found.
6524 This behaviour is, however, controlled by an option called host_lookup_
6525 order, which defaults to "bydns:byaddr". If people want to use the other
6526 order, or indeed, just use one or the other means of lookup, they can
6527 specify it in this variable.
6529 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6530 some operating systems, this comes back from gethostbyaddr() as an empty
6531 string, and this is what Exim used to test for. However, it seems that in
6532 other systems, "." is yielded. Exim now tests for this case too.
6534 7. The values of check_spool_space and check_log_space are now held internally
6535 as a number of kilobytes instead of an absolute number of bytes. If a
6536 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6537 kilobyte. This means that much larger values can be stored.
6539 8. Exim monitor: an attempt to get the action menu when not actually pointing
6540 at a message produces an empty menu entitled "No message selected". This
6541 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6542 no entries in it ("Shell widget menu has zero width and/or height"). So I
6543 have added a single, blank menu entry in this case.
6545 9. Added ${quote_local_part.
6547 10. MIME decoding is now applied to the contents of Subject: header lines when
6550 11. Now that a reference to $sender_host_address automatically causes a reverse
6551 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6552 host lookup before query-style lookups in lists that might use this
6553 variable. This has therefore been abolished, and the "net-" prefix is no
6554 longer necessary for query-style lookups.
6556 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6557 have been a typo for LFLAGS, so it has been changed.
6559 13. The install script calls Exim with "-C /dev/null" in order to find the
6560 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6561 to be output. However, since Exim outputs its version number before the
6562 error, it didn't break the script. It just looked ugly. I fixed this by
6563 always allowing "-C /dev/null" if the caller is root.
6565 14. Ignore overlarge ACL variable number when reading spool file - insurance
6566 against a later release with more variables having written the file.
6568 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6569 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6570 this, as well as the form without the "IPv6" on the front.
6572 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6573 OS/Makefile-Darwin file.
6575 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6576 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6578 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6579 variable. However, some OS use ints for inodes. I've added cast to long int
6580 to get rid of the compiler warning.
6582 19. I had forgotten to lock out "/../" in configuration file names when
6583 ALT_CONFIG_PREFIX was set.
6585 20. Routers used for verification do not need to specify transports. However,
6586 if such a router generated a host list, and callout was configured, Exim
6587 crashed, because it could not find a port number from the (non-existent)
6588 transport. It now assumes port 25 in this circumstance.
6590 21. Added the -t option to exigrep.
6592 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6593 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6594 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6595 them is set, LOOKUP_LSEARCH is forced.
6597 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6599 24. Added sender and host information to the "rejected by local_scan()" log
6600 line; previously there was no indication of these.
6602 25. Added .include_if_exists.
6604 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6605 Linux. It turns out that not all file systems support this. Apparently some
6606 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6607 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6608 not supported on the file descriptor, is now ignored when Exim is trying to
6609 sync a directory. This applies only to Linux.
6611 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6613 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6614 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6617 29. Added support for maildirsize files from supplied patch (modified a bit).
6619 30. The use of :fail: followed by an empty string could lead Exim to respond to
6620 sender verification failures with (e.g.):
6622 550 Verification failed for <xxx>
6623 550 Sender verify failed
6625 where the first response line was missing the '-' that indicates it is not
6626 the final line of the response.
6628 31. The loop for finding the name of the user that called Exim had a hardwired
6629 limit of 10; it now uses the value of finduser_retries, which is used for
6630 all other user lookups.
6632 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6635 33. Exim was neglecting to zero errno before one call of strtol() when
6636 expanding a string and expecting an integer value. On some systems this
6637 resulted in spurious "integer overflow" errors. Also, it was casting the
6638 result into an int without checking.
6640 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6641 did not work. The code looks as if it has *never* worked, though it appears
6642 to have been documented since at least release 1.62. I have made it work.
6644 35. The "timeout_DNS" error in retry rules, also documented since at least
6645 1.62, also never worked. As it isn't clear exactly what this means, and
6646 clearly it isn't a major issue, I have abolished the feature by treating it
6647 as "timeout", and writing a warning to the main and panic logs.
6649 36. The display of retry rules for -brt wasn't always showing the error code
6652 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6653 timeout_connect_A, timeout_connect_MX.
6655 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6656 to the empty sender.
6658 39. The daemon was not analysing the content of -oX till after it had closed
6659 stderr and disconnected from the controlling terminal. This meant that any
6660 syntax errors were only noted on the panic log, and the return code from
6661 the command was 0. By re-arranging the code a little, I've made the
6662 decoding happen first, so such errors now appear on stderr, and the return
6663 code is 1. However, the actual setting up of the sockets still happens in
6664 the disconnected process, so errors there are still only recorded on the
6667 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6668 connections (as happens on some IP stacks) was logged at start up time as
6669 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6670 it from "IPv6 and IPv4", which means that two separate sockets are being
6673 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6674 says whether AF_INET or AF_INET6 was passed as an argument.
6676 42. Exiwhat output was messed up when time zones were included in log
6679 43. Exiwhat now gives more information about the daemon's listening ports,
6680 and whether -tls-on-connect was used.
6682 44. The "port" option of the smtp transport is now expanded.
6684 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6685 silently ignored. Now an error message is written to the main and panic
6688 46. There's a new ACL modifier called "logwrite" which writes to a log file
6689 as soon as it is encountered.
6691 47. Added $local_user_uid and $local_user_gid at routing time.
6693 48. Exim crashed when trying to verify a sender address that was being
6696 49. Exim was recognizing only a space character after ".include". It now also
6697 recognizes a tab character.
6699 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6700 extracting the relevant information from the specification. The man page no
6701 longer contains scrambled data for the -d option, and I've added a section
6702 at the front about calling Exim under different names.
6704 51. Added "extra_headers" argument to the "mail" command in filter files.
6706 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6709 53. Installed eximstats 1.29.
6711 54. Added transport_filter_timeout as a generic transport option.
6713 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6714 Cc: header lines. This was required by RFC 822, but it not required by RFC
6717 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6718 incoming messages that did not have them. Now it does so only if the
6719 message originates locally, that is, if there is no associated remote host
6720 address. When Resent- header lines are present, this applies to the Resent-
6721 lines rather than the non-Resent- lines.
6723 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6724 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6726 58. Messages for configuration errors now include the name of the main
6727 configuration file - useful now that there may be more than one file in a
6728 list (.included file names were always shown).
6730 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6731 for those rare installations that do not start the daemon as root or run it
6732 setuid root. I've cut out the call to initgroups() if the daemon is not
6735 60. The Exim user and group can now be bound into the binary as text strings
6736 that are looked up at the start of Exim's processing.
6738 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6740 62. Added $mailstore_basename variable.
6742 63. Installed patch to sieve.c from Michael Haardt.
6744 64. When Exim failed to open the panic log after failing to open the main log,
6745 the original message it was trying to log was written to stderr and debug
6746 output, but if they were not available (the usual case in production), it
6747 was lost. Now it is written to syslog before the two lines that record the
6748 failures to open the logs.
6750 65. Users' Exim filters run in subprocesses under the user's uid. It is
6751 possible for a "deliver" command or an alias in a "personal" command to
6752 provoke an address rewrite. If logging of address rewriting is configured,
6753 this fails because the process is not running as root or exim. There may be
6754 a better way of dealing with this, but for the moment (because 4.30 needs
6755 to be released), I have disabled address rewrite logging when running a
6756 filter in a non-root, non-exim process.
6762 1. The buildconfig auxiliary program wasn't quoting the value set for
6763 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6764 not defined. This bug was masked in 4.22 by the effect that was fixed in
6767 2. Some messages that were rejected after a message id was allocated were
6768 shown as "incomplete" by exigrep. It no longer does this for messages that
6769 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6771 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6772 have allow_domain_literals set, the ID did not get logged in the <= line.
6773 Domain literals are now always recognized in Message-ID: header lines.
6775 4. The first argument for a ${extract expansion item is the key name or field
6776 number. Leading and trailing spaces in this item were not being ignored,
6777 causing some misleading effects.
6779 5. When deliver_drop_privilege was set, single queue runner processes started
6780 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6781 same command in the process it spins off) were not dropping privilege.
6783 6. When the daemon running as "exim" started a queue runner, it always
6784 re-executed Exim in the spun-off process. This is a waste of effort when
6785 deliver_drop_privilege is set. The new process now just calls the
6786 queue-runner function directly.
6792 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6795 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6796 ignored. Though the use of -oP was forcing the writing of a pid file, it
6797 was always written to the default place.
6799 3. If the message "no IP address found for host xxxx" is generated during
6800 incoming verification, it is now followed by identification of the incoming
6801 connection (so you can more easily find what provoked it).
6803 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6805 5. Added some features to "harden" Exim a bit more against certain attacks:
6807 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6808 be put in Local/Makefile. This is like the never_users runtime option,
6809 but it cannot be overridden. The default setting is "root".
6811 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6812 prefix string with which any file named in a -C command line option
6815 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6816 is retained for -C and -D only if the caller of Exim is root. Without
6817 it, the exim user may also use -C and -D and retain privilege.
6819 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6820 command line option is disabled.
6822 6. Macro names set by the -D option must start with an upper case letter, just
6823 like macro names defined in the configuration file.
6825 7. Added "dereference=" facility to LDAP.
6827 8. Two instances of the typo "uknown" in the source files are fixed.
6829 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6830 the Configure-Makefile script screwed up while processing it.
6832 10. Incorporated PCRE 4.4.
6834 11. The SMTP synchronization check was not operating right at the start of an
6835 SMTP session. For example, it could not catch a HELO sent before the client
6836 waited for the greeting. There is now a check for outstanding input at the
6837 point when the greeting is written. Because of the duplex, asynchronous
6838 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6839 way, but not yet received, when the check is performed.
6841 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6842 on TCP/IP sockets, because this apparently causes some broken clients to
6845 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6846 unchanged) from the Cygwin maintainer.
6848 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6849 was supported instead of testing for mbx. Effectively a typo.
6851 15. The spa authenticator server code was not checking that the input it
6852 received was valid base64.
6854 16. The debug output line for the "set" modifier in ACLs was not showing the
6855 name of the variable that was being set.
6857 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6859 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6860 lookup on its own. Something else was needed to trigger the lookup. For
6861 example, a match in host_lookup or the need for a host name in a host list.
6862 Now, if $sender_host_name is referenced and the host name has not yet been
6863 looked up, a lookup is performed. If the lookup fails, the variable remains
6864 empty, and $host_lookup_failed is set to "1".
6866 19. Added "eqi" as a case-independent comparison operator.
6868 20. The saslauthd authentication condition could segfault if neither service
6869 nor realm was specified.
6871 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6872 error message that was logged was misleading, and incoming SMTP
6873 connections were dropped. The message is now more accurate, and temporary
6874 errors are given to SMTP connections.
6876 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6877 (except RSET) with a 421 error, until QUIT is received. However, it was
6878 failing to send a response to QUIT.
6880 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6881 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6882 ACL is now run after the helo_try_verify_hosts code.
6884 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6885 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6886 case-independent, so other case variants are also recognized). Apparently
6887 some systems use these upper case variants.
6889 25. If more than two messages were waiting for the same host, and a transport
6890 filter was specified for the transport, Exim sent two messages over the
6891 same TCP/IP connection, and then failed with "socket operation on non-
6892 socket" when it tried to send the third.
6894 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6896 27. The extern definition of crypt16() in expand.c was not being excluded when
6897 the OS had its own crypt16() function.
6899 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6900 as a preferred synonym for return_size_limit, both as an option and as an
6903 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6905 30. Changed the default configuration ACL to relax the local part checking rule
6906 for addresses that are not in any local domains. For these addresses,
6907 slashes and pipe symbols are allowed within local parts, but the sequence
6908 /../ is explicitly forbidden.
6910 31. SPA server authentication was not clearing the challenge buffer before
6913 32. log_message in a "warn" ACL statement was writing to the reject log as
6914 well as to the main log, which contradicts the documentation and doesn't
6915 seem right (because no rejection is happening). So I have stopped it.
6917 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6918 However, I am unable to do any testing of this.
6920 34. Fixed an infelicity in the appendfile transport. When checking directories
6921 for a mailbox, to see if any needed to be created, it was accidentally
6922 using path names with one or more superfluous leading slashes; tracing
6923 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6925 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6926 contents are added to the log line that is written for every discarded
6927 recipient. (Previously a log_message setting was ignored.)
6929 36. The ${quote: operator now quotes the string if it is empty.
6931 37. The install script runs exim in order to find its version number. If for
6932 some reason other than non-existence or emptiness, which it checks, it
6933 could not run './exim', it was installing it with an empty version number,
6934 i.e. as "exim-". This error state is now caught, and the installation is
6937 38. An argument was missing from the function that creates an error message
6938 when Exim fails to connect to the socket for saslauthd authentication.
6939 This could cause Exim to crash, or give a corrupted message.
6941 39. Added isip, isip4, and isip6 to ${if conditions.
6943 40. The ACL variables $acl_xx are now saved with the message, and can be
6944 accessed later in routers, transports, and filters.
6946 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6947 strings in the file are not string-expanded.
6949 42. If a MAIL command specified a SIZE value that was too large to fit into an
6950 int variable, the check against message_size_limit failed. Such values are
6951 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6952 day this will have to be increased, but I don't think I want to be around
6953 when emails are that large.
6960 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6961 iconv() is not standard in FreeBSD.
6963 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6964 IPv6 enabled. The observed symptom was a segmentation fault on return from
6965 the function os_common_find_running_interfaces() in src/os.c.
6967 3. In the check_special_case() function in daemon.c I had used "errno" as an
6968 argument name, which causes warnings on some systems. This was basically a
6969 typo, since it was named "eno" in the comments!
6971 4. The code that waits for the clock to tick (at a resolution of some fraction
6972 of a second) so as to ensure message-id uniqueness was always waiting for
6973 at least one whole tick, when it could have waited for less. [This is
6974 almost certainly not relevant at current processor speeds, where it is
6975 unlikely to ever wait at all. But we try to future-proof.]
6977 5. The function that sleeps for a time interval that includes fractions of a
6978 second contained a race. It did not block SIGALRM between setting the
6979 timer, and suspending (a couple of lines later). If the interval was short
6980 and the sigsuspend() was delayed until after it had expired, the suspension
6981 never ended. On busy systems this could lead to processes getting stuck for
6984 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6985 process, before it forks any delivery processes. The open lookup caching
6986 mechanism meant that the open file or database connection was passed into
6987 the delivery process. The problem was that delivery processes always tidy
6988 up cached lookup data. This could cause a problem for the next delivery
6989 process started by the queue runner, because the external queue runner
6990 process does not know about the closure. So the next delivery process
6991 still has data in the lookup cache. In the case of a file lookup, there was
6992 no problem because closing a file descriptor in a subprocess doesn't affect
6993 the parent. However, if the lookup was caching a connection to a database,
6994 the connection was closed, and the second delivery process was likely to
6995 see errors such as "PGSQL: query failed: server closed the connection
6996 unexpectedly". The problem has been fixed by closing all cached lookups
6997 in a queue runner before running a delivery process.
6999 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7000 seem to have the "const" qualifier which it has on other OS. I've
7003 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7004 *of the same type* (client or server) with the same public name that an
7005 error should be diagnosed.
7007 9. When Exim looked up a host name for an IP address, but failed to find the
7008 original IP address when looking up the host name (a safety check), it
7009 output the message "<ip address> does not match any IP for NULL", which was
7010 confusing, to say the least. The bug was that the host name should have
7011 appeared instead of "NULL".
7013 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7014 user that is built into the binary, and the -C or -D options is used, root
7015 privilege is dropped before the configuration file is read. In addition,
7016 logging is switched to stderr instead of the normal log files. If the
7017 configuration then re-defines the Exim user, the unprivileged environment
7018 is probably not what is expected, so Exim logs a panic warning message (but
7021 However, if deliver_drop_privilege is set, the unprivileged state may well
7022 be exactly what is intended, so the warning has been cut out in that case,
7023 and Exim is allowed to try to write to its normal log files.
7029 1. smtp_return_error_details was not giving details for temporary sender
7030 or receiver verification errors.
7032 2. Diagnose a configuration error if two authenticators have the same public
7035 3. Exim used not to create the message log file for a message until the first
7036 delivery attempt. This could be confusing when incoming messages were held
7037 for policy or load reasons. The message log file is now created at the time
7038 the message is received, and an initial "Received" line is written to it.
7040 4. The automatically generated man page for command line options had a minor
7041 bug that caused no ill effects; however, a more serious problem was that
7042 the procedure for building the man page automatically didn't always
7043 operate. Consequently, release 4.20 contains an out-of-date version. This
7044 shouldn't happen again.
7046 5. When building Exim with embedded Perl support, the script that builds the
7047 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7048 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7050 6. The freeze_tell option was not being used for messages that were frozen on
7051 arrival, either by an ACL or by local_scan().
7053 7. Added the smtp_incomplete_transaction log selector.
7055 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7056 was accepting AUTH without a new EHLO.
7058 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7059 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7062 10. Logging of TCP/IP connections (when configured) now happens in the main
7063 daemon process instead of the child process, so that the TCP/IP connection
7064 count is more accurate (but it can never be perfect).
7066 11. The use of "drop" in a nested ACL was not being handled correctly in the
7067 outer ACL. Now, if condition failure induced by the nested "drop" causes
7068 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7069 or "require"), the connection is dropped.
7071 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7072 that yield "discard" can now be used with an "accept" or a "discard" verb,
7073 but an error is generated for any others (because I can't see a useful way
7074 to define what should happen).
7076 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7077 are now processed in the same way as lines in the Exim configuration file.
7078 In particular, continuation lines are supported.
7080 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7082 15. Added -ti meaning -t -i.
7084 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7085 domains, and warn by logging if others are found.
7087 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7088 returned from GIFCONF when Exim is trying to find the list of interfaces on
7089 a host. The code in os.c has been modified to copy each ifreq to an aligned
7090 structure in all cases.
7092 Also, in some cases, the returned ifreq's were being copied to a 'struct
7093 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7094 means the last couple of bytes of an IPv6 address could be chopped if the
7095 ifreq contained only a normal sockaddr (14 bytes storage).
7097 18. Named domain lists were not supported in the hosts_treat_as_local option.
7098 An entry such as +xxxx was not recognized, and was treated as a literal
7101 19. Ensure that header lines added by a DATA ACL are included in the reject log
7102 if the ACL subsequently rejects the message.
7104 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7105 MD5 (which is deprecated).
7107 21. When testing a filter file using -bf, Exim was writing a message when it
7108 took the sender from a "From " line in the message, but it was not doing so
7109 when it took $return_path from a Return-Path: header line. It now does.
7111 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7112 with a valid header line field name (a series of printing characters
7113 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7115 23. Changed "disc" in the source to "disk" to conform to the documentation and
7116 the book and for uniformity.
7118 24. Ignore Sendmail's -Ooption=value command line item.
7120 25. When execve() failed while trying to run a command in a pipe transport,
7121 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7122 could be confused with a return value of 69 from the command itself. This
7123 has been changed to 127, the value the shell returns if it is asked to run
7124 a non-existent command. The wording for the related log line suggests a
7125 non-existent command as the problem.
7127 26. If received_header_text expands to an empty string, do not add a Received:
7128 header line to the message. (Well, it adds a token one on the spool, but
7129 marks it "old" so that it doesn't get used or transmitted.)
7131 27. Installed eximstats 1.28 (addition of -nt option).
7133 28. There was no check for failure on the call to getsockname() in the daemon
7134 code. This can fail if there is a shortage of resources on the system, with
7135 ENOMEM, for example. A temporary error is now given on failure.
7137 29. Contrary to the C standard, it seems that in some environments, the
7138 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7139 program. Exim now does this explicitly; it affects the formatting of
7140 timestamps using strftime().
7142 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7143 complaints. I've now initialized all the variables, to avoid this.
7145 32. Header lines added by a system filter were not being "seen" during
7146 transport-time rewrites.
7148 33. The info_callback() function passed to OpenSSL is set up with type void
7149 (*)(SSL *, int, int), as described somewhere. However, when calling the
7150 function (actually a macro) that sets it up, the type void(*)() is
7151 expected. I've put in a cast to prevent warnings from picky compilers.
7153 34. If a DNS black list lookup found a CNAME record, but there were no A
7154 records associated with the domain it pointed at, Exim crashed.
7156 35. If a DNS black list lookup returned more than one A record, Exim ignored
7157 all but the first. It now scans all returned addresses if a particular IP
7158 value is being sought. In this situation, the contents of the
7159 $dnslist_value variable are a list of all the addresses, separated by a
7162 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7163 to accept a host name and all its aliases if the forward lookup for any of
7164 them yielded the IP address of the incoming connection. Now it accepts only
7165 those names whose forward lookup yields the correct IP address. Any other
7166 names are discarded. This closes a loophole whereby a rogue DNS
7167 administrator could create reverse DNS records to break through a
7168 wildcarded host restriction in an ACL.
7170 37. If a user filter or a system filter that ran in a subprocess used any of
7171 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7172 the wrong values were passed to the pipe command ($thisaddress had the
7173 value of $0, $0 had the value of $1, etc). This bug was introduced by
7174 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7176 38. Improved the line breaking for long SMTP error messages from ACLs.
7177 Previously, if there was no break point between 40 and 75 characters, Exim
7178 left the rest of the message alone. Two changes have been made: (a) I've
7179 reduced the minimum length to 35 characters; (b) if it can't find a break
7180 point between 35 and 75 characters, it looks ahead and uses the first one
7181 that it finds. This may give the occasional overlong line, but at least the
7182 remaining text gets split now.
7184 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7185 file descriptors might be low, and that setting 1000 would always raise it.
7186 It turns out that in some environments, the limit is already over 1000 and
7187 that lowering it causes trouble. So now Exim takes care not to decrease it.
7189 40. When delivering a message, the value of $return_path is set to $sender_
7190 address at the start of routing (routers may change the value). By an
7191 oversight, this default was not being set up when an address was tested by
7192 -bt or -bv, which affected the outcome if any router or filter referred to
7195 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7196 log only when "message" or "log_message" are set. However, if one of the
7197 conditions was an address verification, or a call to a nested ACL, the
7198 messages generated by the underlying test were being passed through. This
7199 no longer happens. The underlying message is available in $acl_verify_
7200 message for both "message" and "log_message" expansions, so it can be
7201 passed through if needed.
7203 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7204 new expansion $bh_ to give the encoded byte string without charset
7205 translation. Translation happens only if iconv() is available; HAVE_ICONV
7206 indicates this at build time. HEADERS_CHARSET gives the charset to
7207 translate to; headers_charset can change it in the configuration, and
7208 "headers charset" can change it in an individual filter file.
7210 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7211 that creates RFC 2047 encoded "words" labels them as that charset instead
7212 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7213 expansion operator; (ii) when Exim creates a From: line for a local
7214 message; (iii) when a header line is rewritten to include a "phrase" part.
7216 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7217 buggy, causing it to skip the first lines of messages whose message ID
7218 ended in 'D'. This would not have bitten before Exim release 4.14, because
7219 message IDs were unlikely to end in 'D' before then. The effect was to have
7220 incorrect size information for certain domains.
7222 45. #include "config.h" was missing at the start of the crypt16.c module. This
7223 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7226 46. If there was a timeout during a "random" callout check, Exim treated it as
7227 a failure of the random address, and carried on sending RSET and the real
7228 address. If the delay was just some slowness somewhere, the response to the
7229 original RCPT would be taken as a response to RSET and so on, causing
7230 mayhem of various kinds.
7232 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7233 when I implemented it. It didn't allow for the fact that some option values
7234 may legitimately be negative (e.g. size_addition), and it didn't even do
7235 the right test for positive values.
7237 48. Domain names in DNS records are case-independent. Exim always looks them up
7238 in lower case. Some resolvers return domain names in exactly the case they
7239 appear in the zone file, that is, they may contain uppercase letters. Not
7240 all resolvers do this - some return always lower case. Exim was treating a
7241 change of case by a resolver as a change of domain, similar to a widening
7242 of a domain abbreviation. This triggered its re-routing code and so it was
7243 trying to route what was effectively the same domain again. This normally
7244 caused routing to fail (because the router wouldn't handle the domain
7245 twice). Now Exim checks for this case specially, and just changes the
7246 casing of the domain that it ultimately uses when it transmits the message
7249 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7252 50. If a filter generated a file delivery with a non-absolute name (possible if
7253 no home directory exists for the router), the forbid_file option was not
7256 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7257 the existing equality matching.
7259 52. Exim was using ints instead of ino_t variables in some places where it was
7260 dealing with inode numbers.
7262 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7263 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7264 called TMPDIR, and if it finds it is different, it changes its value.
7266 54. The smtp_printf() function is now made available to local_scan() so
7267 additional output lines can be written before returning. There is also an
7268 smtp_fflush() function to enable the detection of a dropped connection.
7269 The variables smtp_input and smtp_batched_input are exported to
7272 55. Changed the default runtime configuration: the message "Unknown user"
7273 has been removed from the ACL, and instead placed on the localuser router,
7274 using the cannot_route_message feature. This means that any verification
7275 failures that generate their own messages won't get overridden. Similarly,
7276 the "Unrouteable address" message that was in the ACL for unverifiable
7277 relay addresses has also been removed.
7279 56. Added hosts_avoid_esmtp to the smtp transport.
7281 57. The exicyclog script was not checking for the esoteric option
7282 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7283 will work only if exicyclog is run under the appropriate euid.
7285 58. Following a discussion on the list, the rules by which Exim recognises line
7286 endings on incoming messages have been changed. The -dropcr and drop_cr
7287 options are now no-ops, retained only for backwards compatibility. The
7288 following line terminators are recognized: LF CRLF CR. However, special
7289 processing applies to CR:
7291 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7292 nor a local message in the state where . is a terminator.
7294 (ii) If a bare CR is encountered in a header line, an extra space is added
7295 after the line terminator so as not to end the header. The reasoning
7296 behind this is that bare CRs in header lines are most likely either
7297 to be mistakes, or people trying to play silly games.
7299 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7300 was being incorrectly given as 18 bytes larger than it should have been.
7301 This is a VOB (very old bug).
7303 60. This may never have affected anything current, but just in case it has:
7304 When the local host is found other than at the start of a list of hosts,
7305 the local host, those with the same MX, and any that follow, are discarded.
7306 When the list in question was part of a longer list of hosts, the following
7307 hosts (not currently being processed) were also being discarded. This no
7308 longer happens. I'm not sure if this situation could ever has previously
7311 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7314 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7315 header. This is something that is recommended in a new Internet Draft, and
7316 is something that is documented as being done by Sendmail. There are two
7317 possible values. For messages generated by the autoreply transport, Exim
7320 Auto-Submitted: auto-replied
7322 whereas for all other generated messages (e.g. bounces) it adds
7324 Auto-Submitted: auto-generated
7326 63. The "personal" condition in filters now includes a test for the
7327 Auto-Submitted: header. If it contains the string "auto-" the message it
7328 not considered personal.
7330 64. Added rcpt_include_affixes as a generic transport option.
7332 65. Added queue_only_override (default true).
7334 66. Added the syslog_duplication option.
7336 67. If what should have been the first header line of a message consisted of
7337 a space followed by a colon, Exim was mis-interpreting it as a header line.
7338 It isn't of course - it is syntactically invalid and should therefore be
7339 treated as the start of the message body. The misbehaviour could have
7340 caused a number of strange effects, including loss of data in subsequent
7341 header lines, and spool format errors.
7343 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7344 client host had authenticated. This control can now be exercised by an ACL
7345 for more flexibility.
7347 69. By default, callouts do not happen when testing with -bh. There is now a
7348 variant, -bhc, which does actually run the callout code, including
7349 consulting and updating the callout cache.
7351 70. Added support for saslauthd authentication, courtesy of Alexander
7354 71. If statvfs() failed on the spool or log directories while checking their
7355 size for availability, Exim confusingly gave the error "space shortage".
7356 Furthermore, in debugging mode it crashed with a floating point exception.
7357 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7358 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7359 serious problem, Exim now writes to the main and panic logs when this
7360 happens, with details of the failure. It then refuses to accept the
7361 incoming message, giving the message "spool directory problem" or "log
7362 directory problem" with a 421 code for SMTP messages.
7364 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7365 0, 1, and 2 exist, because some OS complain for execs without them (see
7366 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7367 descriptors. However, the code omitted to check that the open succeeded,
7368 causing mysterious errors if for some reason the permissions on /dev/null
7369 got screwed. Now Exim writes a message to the main and panic logs, and
7370 bombs out if it can't open /dev/null.
7372 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7373 interact so that it is all more flexible. It is supposed to remain
7374 backwards compatible. Also added extra_local_interfaces.
7376 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7377 to bomb out with an assertion failure - to the client this appears as a
7378 connection drop. This problem occurs in the part of the code that was taken
7379 from the Samba project. Fortunately, the assertion is in a very simple
7380 function, so I have fixed this by reproducing the function inline in the
7381 one place where it is called, and arranging for authentication to fail
7382 instead of killing the process with assert().
7384 75. The SPA client code was not working when the server requested OEM rather
7385 than Unicode encoding.
7387 76. Added code to make require_files with a specific uid setting more usable in
7388 the case where statting the file as root fails - usually a non-root-mounted
7389 NFS file system. When this happens and the failure is EACCES, Exim now
7390 forks a subprocess and does the per-uid checking as the relevant uid.
7392 77. Added process_log_path.
7394 78. If log_file_path was not explicitly set, a setting of check_log_space or
7395 check_log_inodes was ignored.
7397 79. If a space check for the spool or log partitions fails, the incident is now
7398 logged. Of course, in the latter case the data may get lost...
7400 80. Added the %p formatting code to string_format() so that it can be used to
7401 print addresses in debug_print(). Adjusted all the address printing in the
7402 debugging in store.c to use %p rather than %d.
7404 81. There was a concern that a line of code in smtp_in.c could overflow a
7405 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7406 initially expressed, the concern was not well-founded, because trailing
7407 spaces are removed early. However, if the trailing spaces were followed by
7408 a NULL, they did not get removed, so the overflow was possible. Two fixes
7411 (a) I re-wrote the offending code in a cleaner fashion.
7412 (b) If an incoming SMTP command contains a NULL character, it is rejected
7415 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7416 runs initgroups(), so that if the Exim user is in any additional groups,
7417 they will be used during message reception.
7423 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob