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.
61 JH/01 Remove code calling the customisable local_scan function, unless a new
62 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
64 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
65 non-signal-safe functions being used.
67 JH/03 Bug 2269: When presented with a received message having a stupidly large
68 number of DKIM-Signature headers, disable DKIM verification to avoid
69 a resource-consumption attack. The limit is set at twenty.
71 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
72 report of oldest_pass in ${authres } in consequence, and separate out
73 some descriptions of reasons for verification fail.
75 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
76 files in the spool were present and unlocked. A queue-runner could spot
77 them, resulting in a duplicate delivery. Fix that by doing the unlock
78 after the unlink. Investigation by Tim Stewart. Take the opportunity to
79 add more error-checking on spoolfile handling while that code is being
82 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
83 No known attacks, no CVE, this is defensive hardening.
85 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
86 a queue-runner could start a delivery while other operations were ongoing.
87 Cutthrough delivery was a common victim, resulting in duplicate delivery.
88 Found and investigated by Tim Stewart. Fix by using the open message data
89 file handle rather than opening another, and not locally closing it (which
90 releases a lock) for that case, while creating the temporary .eml format
91 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
93 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
94 $sender_verify_failure/$recipient_verify_failure to "random".
96 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
99 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
100 Previously this would segfault.
102 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
105 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
106 like zero, since the resolver should be doing this for us, But we need one
107 as a CNAME but no MX presence gets the CNAME returned; we need to check
108 that doesn't point to an MX to declare it "no MX returned" rather than
109 "error, loop". A new main option is added so the older capability of
110 following some limited number of chain links is maintained.
112 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
114 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
115 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
116 now-deprecated earlier definitions used only specified the range up to TLS
117 1.2 (in the older-version library docs).
119 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
121 JH/15 Rework TLS client-side context management. Stop using a global, and
122 explicitly pass a context around. This enables future use of TLS for
123 connections to service-daemons (eg. malware scanning) while a client smtp
124 connection is using TLS; with cutthrough connections this is quite likely.
126 JH/16 Fix ARC verification to do AS checks in reverse order.
128 JH/17 Support a "tls" option on the ${readsocket } expansion item.
130 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
131 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
132 Previously the "utf8" would be re-prepended for every additional message.
134 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
135 Previously thery were accepted, resulting in issues when attempting to
136 forward messages to a non-supporting MTA.
138 PP/02 Let -n work with printing macros too, not just options.
140 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
141 one parent address was copied, and bogus data was used at delivery-logging
142 time. Either a crash (after delivery) or bogus log data could result.
143 Discovery and analysis by Tim Stewart.
145 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
146 Previously if the string ended mid-character, we did not insert the
147 promised '?' replacement.
149 PP/04 Documentation: current string operators work on bytes, not codepoints.
151 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
152 should pack well giving a smaller memory footprint so better caching and
153 therefore performance. Group the declarations where this can't be done so
154 that the byte-sized flag variables are not interspersed among pointer
155 variables, giving a better chance of good packing by the compiler.
157 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
158 non-null, to avoid issues with sites running BATV. Previously reports were
159 sent with an empty envelope sender so looked like bounces.
161 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
162 The ignore_error flag wasn't being returned from the filter subprocess so
163 was not set for later routers. Investigation and fix by Matthias Kurz.
165 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
166 and a msg:complete for the whole, when a message is manually removed using
167 -Mrm. Developement by Matthias Kurz, hacked on by JH.
169 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
170 a "Gnu special" function, asprintf() in the DB utility binary builds; I
171 hope that is portable enough.
173 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
174 requiring a known-CA anchor certificate; make it now rely entirely on the
175 TLSA as an anchor. Checking the name on the leaf cert against the name
176 on the A-record for the host is still done for TA (but not for EE mode).
178 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
179 included in delivery lines for non-proxied connections, when compiled with
180 SUPPORT_SOCKS and running with proxy logging enabled.
182 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
183 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
184 move the existing event to fire before the normal logging of message
185 failure so that custom logging is bracketed by normal logging.
187 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
188 msg:fail:internal event. Developement by Matthias Kurz.
190 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
191 far too small for todays use of crypto signatures stored there. Go all
192 the way to the max DNS message size of 64kB, even though this might be
193 overmuch for IOT constrained device use.
195 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
196 copy a string over itself. The library routine is documented as not
197 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
199 JH/32 For main options check_spool_space and check_inode_space, where the
200 platform supports 64b integers, support more than the previous 2^31 kB
201 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
202 the previous G, M, k.
204 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
205 $authenticated_fail_id variable on authentication failure. Previously
208 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
209 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
210 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
211 GNUTLS_SEC_PARAM_MEDIUM.
213 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
214 side. Previously we would continue as if no SNI had been received.
216 JH/36 Harden the handling of string-lists. When a list consisted of a sole
217 "<" character, which should be a list-separator specification, we walked
218 off past the nul-terimation.
220 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
221 causes) even when the retry time is not yet met. Previously they were
222 not, meaning that when (say) an account was over-quota and temp-rejecting,
223 and multiple senders' messages were queued, only one sender would get
224 notified on each configured delay_warning cycle.
226 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
228 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
229 cipher-suites, an error can be left on the stack even for a succeeding
230 accept; this results in impossible error messages when a later operation
233 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
234 return error codes indicating retry. Under TLS1.3 this becomes required.
236 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
237 it only wrote the new authenticators, resulting in a lack of tracking of
238 peer changes of ESMTP extensions until the next cache flush.
240 JH/41 Fix the loop reading a message header line to check for integer overflow,
241 and more-often against header_maxsize. Previously a crafted message could
242 induce a crash of the recive process; now the message is cleanly rejected.
244 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
245 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
251 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
252 When redis_servers is set to a list of > 1 element, and the Redis servers
253 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
254 case of MOVED into a DEFER case instead, thus moving the query onto the
255 next server in the list. For a cluster of N elements, all N servers must
256 be defined in redis_servers.
258 GF/02 Catch and remove uninitialized value warning in exiqsumm
259 Check for existence of @ARGV before looking at $ARGV[0]
261 JH/01 Replace the store_release() internal interface with store_newblock(),
262 which internalises the check required to safely use the old one, plus
263 the allocate and data copy operations duplicated in both (!) of the
264 extant use locations.
266 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
267 modifier. This matches the restriction on the commandline.
269 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
270 Previously only the last row was returned.
272 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
273 we assumed that tags in the header were well-formed, and parsed the
274 element content after inspecting only the first char of the tag.
275 Assumptions at that stage could crash the receive process on malformed
278 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
279 While running the DKIM ACL we operate on the Permanent memory pool so that
280 variables created with "set" persist to the DATA ACL. Also (at any time)
281 DNS lookups that fail create cache records using the Permanent pool. But
282 expansions release any allocations made on the current pool - so a dnsdb
283 lookup expansion done in the DKIM ACL releases the memory used for the
284 DNS negative-cache, and bad things result. Solution is to switch to the
285 Main pool for expansions.
286 While we're in that code, add checks on the DNS cache during store_reset,
287 active in the testsuite.
288 Problem spotted, and debugging aided, by Wolfgang Breyha.
290 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
291 When none of the hosts presented to a transport match an already-open
292 connection, close it and proceed with the list. Previously we would
293 queue the message. Spotted by Lena with Yahoo, probably involving
296 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
297 Previously a spurious "250 OK id=" response was appended to the proper
300 JH/08 The "support for" informational output now, which built with Content
301 Scanning support, has a line for the malware scanner interfaces compiled
302 in. Interface can be individually included or not at build time.
304 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
305 by the template makefile "src/EDITME". The "STREAM" support for an older
306 ClamAV interface method is removed.
308 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
309 rows affected is given instead).
311 JH/11 The runtime Berkeley DB library version is now additionally output by
312 "exim -d -bV". Previously only the compile-time version was shown.
314 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
315 SMTP connection. Previously, when one had more receipients than the
316 first, an abortive onward connection was made. Move to full support for
317 multiple onward connections in sequence, handling cutthrough connection
318 for all multi-message initiating connections.
320 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
321 routers. Previously, a multi-recipient message would fail to match the
322 onward-connection opened for the first recipient, and cause its closure.
324 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
325 a timeout on read on a GnuTLS initiating connection, resulting in the
326 initiating connection being dropped. This mattered most when the callout
327 was marked defer_ok. Fix to keep the two timeout-detection methods
330 JH/15 Relax results from ACL control request to enable cutthrough, in
331 unsupported situations, from error to silently (except under debug)
332 ignoring. This covers use with PRDR, frozen messages, queue-only and
335 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
337 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
338 metadata, resulting in a crash in free().
340 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
341 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
342 Broken also in d185889f4, with init system revamp.
344 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
345 Previously we abruptly closed the connection after reading a malware-
346 found indication; now we go on to read the "scan ok" response line,
349 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
350 ACL. Previously, a crash would result.
352 JH/19 Speed up macro lookups during configuration file read, by skipping non-
353 macro text after a replacement (previously it was only once per line) and
354 by skipping builtin macros when searching for an uppercase lead character.
356 JH/20 DANE support moved from Experimental to mainline. The Makefile control
357 for the build is renamed.
359 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
360 was allocated for every new TLS startup, meaning one per message. Fix
361 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
363 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
364 reported the original. Fix to report (as far as possible) the ACL
365 result replacing the original.
367 JH/23 Fix memory leak during multi-message connections using STARTTLS under
368 OpenSSL. Certificate information is loaded for every new TLS startup,
369 and the resources needed to be freed.
371 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
373 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
376 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
377 DATA response info to the (existing) per-recipient response info for
378 the "C=" log element. It can have useful tracking info from the
379 destination system. Patch from Simon Arlott.
381 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
382 length value. Previously this would segfault.
384 HS/02 Support Avast multiline protoocol, this allows passing flags to
385 newer versions of the scanner.
387 JH/28 Ensure that variables possibly set during message acceptance are marked
388 dead before release of memory in the daemon loop. This stops complaints
389 about them when the debug_store option is enabled. Discovered specifically
390 for sender_rate_period, but applies to a whole set of variables.
391 Do the same for the queue-runner and queue-list loops, for variables set
392 from spool message files. Do the same for the SMTP per-message loop, for
393 certain variables indirectly set in ACL operations.
395 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
396 as a multi-recipient message from a mailinglist manager). The coding had
397 an arbitrary cutoff number of characters while checking for more input;
398 enforced by writing a NUL into the buffer. This corrupted long / fast
399 input. The problem was exposed more widely when more pipelineing of SMTP
400 responses was introduced, and one Exim system was feeding another.
401 The symptom is log complaints of SMTP syntax error (NUL chars) on the
402 receiving system, and refused recipients seen by the sending system
403 (propating to people being dropped from mailing lists).
404 Discovered and pinpointed by David Carter.
406 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
407 replaced by the ${authresults } expansion.
409 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
411 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
412 allows proper process termination in container environments.
414 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
415 Previously the "final dot" had a newline after it; ensure it is CR,LF.
417 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
418 and "err_perm", deprecated since 4.83 when the RFC-defined words
419 "temperror" and "permerror" were introduced.
421 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
422 transport-filters or DKIM-signing. The restriction was lost in the
423 consolidation of verify-callout and delivery SMTP handling.
424 Extend the restriction to also cover ARC-signing.
426 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
427 in defer=pass mode supply a 450 to the initiator. Previously the message
430 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
431 tls_require_ciphers is used as before.
433 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
434 "pass_unscanned". Only tmpfails from the scanner are written to
435 the paniclog, as they may require admin intervention (permission
436 denied, license issues). Other scanner errors (like decompression
437 bombs) do not cause a paniclog entry.
439 JH/36 Fix reinitialisation of DKIM logging variable between messages.
440 Previously it was possible to log spurious information in receive log
443 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
444 triggered odd behaviour from Outlook Express clients.
446 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
449 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
450 since the IETF WG has not yet settled on that versus the original
451 "bare" representation.
453 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
454 Previously the millisecond value corrupted the output.
455 Fix also for syslog_pid=no and log_selector +pid, for which the pid
456 corrupted the output.
462 JH/01 Rework error string handling in TLS interface so that the caller in
463 more cases is responsible for logging. This permits library-sourced
464 string to be attached to addresses during delivery, and collapses
465 pairs of long lines into single ones.
467 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
468 during configuration. Wildcards are allowed and expanded.
470 JH/02 Rework error string handling in DKIM to pass more info back to callers.
471 This permits better logging.
473 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
474 do not close it down and have the child transport start it up again on
475 the passed-on TCP connection. Instead, proxy the child (and any
476 subsequent ones) for TLS via a unix-domain socket channel. Logging is
477 affected: the continued delivery log lines do not have any DNSSEC, TLS
478 Certificate or OCSP information. TLS cipher information is still logged.
480 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
481 identical IP addresses on different listening ports. Will also affect
484 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
485 add noisy ifdef guards to special-case this sillyness.
486 Patch from Bernd Kuhls.
488 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
489 than 255 are no longer allowed.
491 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
492 Disable the session-cache too, which might reduce our load. Since we
493 currrectly use a new context for every connection, both as server and
494 client, there is no benefit for these.
495 GnuTLS appears to not support tickets server-side by default (we don't
496 call gnutls_session_ticket_enable_server()) but client side is enabled
497 by default on recent versions (3.1.3 +) unless the PFS priority string
500 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
501 <https://reproducible-builds.org/specs/source-date-epoch/>.
503 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
504 the check for any unsuccessful recipients did not notice the limit, and
505 erroneously found still-pending ones.
507 JH/08 Pipeline CHUNKING command and data together, on kernels that support
508 MSG_MORE. Only in-clear (not on TLS connections).
510 JH/09 Avoid using a temporary file during transport using dkim. Unless a
511 transport-filter is involved we can buffer the headers in memory for
512 creating the signature, and read the spool data file once for the
513 signature and again for transmission.
515 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
516 4.77 as the kernel support then wasn't solid, having issues in 64bit
517 mode. Now, it's been long enough. Add support for FreeBSD also.
519 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
520 case where the routing stage had gathered several addresses to send to
521 a host before calling the transport for the first, we previously failed
522 to close down TLS in the old transport process before passing the TCP
523 connection to the new process. The new one sent a STARTTLS command
524 which naturally failed, giving a failed delivery and bloating the retry
525 database. Investigation and fix prototype from Wolfgang Breyha.
527 JH/12 Fix check on SMTP command input synchronisation. Previously there were
528 false-negatives in the check that the sender had not preempted a response
529 or prompt from Exim (running as a server), due to that code's lack of
530 awareness of the SMTP input buffering.
532 PP/04 Add commandline_checks_require_admin option.
533 Exim drops privileges sanely, various checks such as -be aren't a
534 security problem, as long as you trust local users with access to their
535 own account. When invoked by services which pass untrusted data to
536 Exim, this might be an issue. Set this option in main configuration
537 AND make fixes to the calling application, such as using `--` to stop
540 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
541 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
542 responses to those, into a single TLS record each way (this usually means
543 a single packet). As a side issue, smtp_enforce_sync now works on TLS
546 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
547 affects you only if you're dancing at the edge of the param size limits.
548 If you are, and this message makes sense to you, then: raise the
549 configured limit or use OpenSSL 1.1. Nothing we can do for older
552 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
553 cmdline element to get the documented default one. Previously it was
556 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
557 are unsuable for non-message-specific reasons - eg. connection timeout,
558 banner-time rejection.
560 JH/16 Fix logging of delivery remote port, when specified by router, under
563 PP/06 Repair manualroute's ability to take options in any order, even if one
564 is the name of a transport.
567 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
569 JH/17 Change the list-building routines interface to use the expanding-string
570 triplet model, for better allocation and copying behaviour.
572 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
573 Previously it was constructed the first time a possibly-matching string
574 was met in the configuration file input during startup; now it is done
577 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
578 compatible one, to avoid the (poorly documented) possibility of a config
579 file in the working directory redirecting the DB files, possibly correpting
580 some existing file. CVE-2017-10140 assigned for BDB.
582 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
583 cache-hot. Previously, although the result was properly cached, the
584 initial verify call returned a defer.
586 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
587 the main verify for receipient in uncached-mode.
589 JH/22 Retire historical build files to an "unsupported" subdir. These are
590 defined as "ones for which we have no current evidence of testing".
592 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
593 if present. Previously it was ignored.
595 JH/24 Start using specified-initialisers in C structure init coding. This is
596 a C99 feature (it's 2017, so now considered safe).
598 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
599 if was a fixed-sized field and bitmask ops via macros; it is now more
602 PP/07 GitHub PR 56: Apply MariaDB build fix.
603 Patch provided by Jaroslav Škarvada.
605 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
606 during Coverity cleanups [4.87 JH/47]
607 Diagnosis and fix provided by Michael Fischer v. Mollard.
609 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
610 the right size to place the terminating semicolon on its own folded
611 line, the header hash was calculated to an incorrect value thanks to
612 the (relaxed) space the fold became.
614 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
615 and confused the parent.
617 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
618 which could crash as a result. This could lead to undeliverable messages.
620 JH/28 Logging: "next input sent too soon" now shows where input was truncated
623 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
624 matters on fast-turnover and PID-randomising systems, which were getting
625 out-of-order delivery.
627 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
628 a possibly-overlapping copy. The symptom was that "Remote host closed
629 connection in response to HELO" was logged instead of the actual 4xx
632 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
633 Previously only that bufferd was discarded, resulting in SYMTP command
636 JH/32 DKIM: when a message has multiple signatures matching an identity given
637 in dkim_verify_signers, run the dkim acl once for each. Previously only
638 one run was done. Bug 2189.
640 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
641 "panic the current process" to "deliberately defer". The panic log is
642 still written with the problem list name; the mail and reject logs now
643 get a temp-reject line for the message that was being handled, saying
644 something like "domains check lookup or other defer". The SMTP 451
645 message is still "Temporary local problem".
647 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
648 A crafted sequence of BDAT commands could result in in-use memory beeing
649 freed. CVE-2017-16943.
651 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
652 from SMTP input. Previously it was always done; now only done for DATA
653 and not BDAT commands. CVE-2017-16944.
655 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
656 to the message (such as an overlong header line). Previously this was
657 not done and we did not exit BDAT mode. Followon from the previous item
658 though a different problem.
664 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
665 than -2003 did; needs libidn2 in addition to libidn.
667 JH/02 The path option on a pipe transport is now expanded before use.
669 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
670 Patch provided by "Björn", documentation fix added too.
672 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
673 missing a wire-to-host endian conversion.
675 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
676 close after a BDAT command line could be taken as a following command,
677 giving a synch failure. Fix by only checking for synch immediately
678 before acknowledging the chunk.
680 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
681 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
682 macro. Patches provided by Josh Soref.
684 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
685 Previously we did not; the RFC seems ambiguous and VRFY is not listed
686 by IANA as a service extension. However, John Klensin suggests that we
689 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
690 the dkim code may be unix-mode line endings rather than smtp wire-format
691 CRLF, so prepend a CR to any bare LF.
693 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
694 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
696 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
697 the first were themselves being wrongly included in the feed into dkim
698 processing; with most chunk sizes in use this resulted in an incorrect
699 body hash calculated value.
701 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
702 DKIM signature block, for verification. Although advised against by
703 standards it is specifically not ruled illegal.
705 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
707 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
708 missing a body hash (the bh= tag).
710 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
711 It seems that HAProxy sends the Proxy Protocol information in clear and
712 only then does a TLS startup, so do the same.
714 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
715 TCP connections (such as for Spamd) unless the daemon successfully set
716 Fast Open mode on its listening sockets. This fixes breakage seen on
717 too-old kernels or those not configured for Fast Open, at the cost of
718 requiring both directions being enabled for TFO, and TFO never being used
719 by non-daemon-related Exim processes.
721 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
722 endings, at least on the first header line. Try to canonify any that get
723 past that check, despite the cost.
725 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
726 now limited to an arbitrary five deep, while parsing addresses with the
727 strip_excess_angle_brackets option enabled.
729 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
730 instead leave the unprompted TLS handshake in socket buffer for the
731 TLS library to consume.
733 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
735 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
737 JH/16 Drop variables when they go out of scope. Memory management drops a whole
738 region in one operation, for speed, and this leaves assigned pointers
739 dangling. Add checks run only under the testsuite which checks all
740 variables at a store-reset and panics on a dangling pointer; add code
741 explicitly nulling out all the variables discovered. Fixes one known
742 bug: a transport crash, where a dangling pointer for $sending_ip_address
743 originally assigned in a verify callout, is re-used.
745 PP/06 Drop '.' from @INC in various Perl scripts.
747 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
749 PP/08 Reduce a number of compilation warnings under clang; building with
750 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
751 should be warning-free.
753 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
755 HS/01 Fix portability problems introduced by PP/08 for platforms where
756 realloc(NULL) is not equivalent to malloc() [SunOS et al].
758 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
759 chunk. This allows us to accept broken chunked messages. We need a more
760 general solution here.
762 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
763 already-broken messages in the queue.
765 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
767 JH/19 Fix reference counting bug in routing-generated-address tracking.
773 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
774 supports it and a size is available (ie. the sending peer gave us one).
776 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
777 years of being deprecated). The replacements are the ACLs
778 acl_smtp_mime and acl_not_smtp_mime.
780 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
781 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
782 or even an in-clear connection were permitted. Now, if the host lookup
783 was dnssec and dane was requested then the host is only used if the
784 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
785 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
786 if one fails this test.
787 This means that a poorly-configured remote DNS will make it incommunicado;
788 but it protects against a DNS-interception attack on it.
790 JH/04 Bug 1810: make continued-use of an open smtp transport connection
791 non-noisy when a race steals the message being considered.
793 JH/05 If main configuration option tls_certificate is unset, generate a
794 self-signed certificate for inbound TLS connections.
796 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
797 in rewrites and routers.
799 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
800 and logged a warning sing 4.83; now they are a configuration file error.
802 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
803 (lacking @domain). Apply the same qualification processing as RCPT.
805 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
807 JH/10 Support ${sha256:} applied to a string (as well as the previous
810 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
811 a cutthrough deliver is pending, as we always want to make a connection.
812 This also avoids re-routing the message when later placing the cutthrough
813 connection after a verify cache hit.
814 Do not update it with the verify result either.
816 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
817 when routing results in more than one destination address.
819 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
820 signing (which inhibits the cutthrough capability). Previously only
821 the presence of an option was tested; now an expansion evaluating as
822 empty is permissible (obviously it should depend only on data available
823 when the cutthrough connection is made).
825 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
826 the relevant preceding SMTP command did not note the pipelining mode.
828 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
829 Previously they were not counted.
831 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
832 as one having no matching records. Previously we deferred the message
833 that needed the lookup.
835 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
836 distinguished as "(=".
838 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
839 for missing MX records. Previously it only worked for missing A records.
841 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
843 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
844 after the data-go-ahead and data-ack. Patch from Jason Betts.
846 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
847 even for a "none" policy. Patch from Tony Meyer.
849 JH/22 Fix continued use of a connection for further deliveries. If a port was
850 specified by a router, it must also match for the delivery to be
853 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
854 When one of the recipients of a message was unsuitable for the connection
855 (has no matching addresses), we lost track of needing to mark it
856 deferred. As a result mail would be lost.
858 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
860 JH/25 Decoding ACL controls is now done using a binary search; the source code
861 takes up less space and should be simpler to maintain. Merge the ACL
862 condition decode tables also, with similar effect.
864 JH/26 Fix problem with one_time used on a redirect router which returned the
865 parent address unchanged. A retry would see the parent address marked as
866 delivered, so not attempt the (identical) child. As a result mail would
869 JH/27 Fix a possible security hole, wherein a process operating with the Exim
870 UID can gain a root shell. Credit to http://www.halfdog.net/ for
871 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
874 JH/28 Enable {spool,log} filesystem space and inode checks as default.
875 Main config options check_{log,spool}_{inodes,space} are now
876 100 inodes, 10MB unless set otherwise in the configuration.
878 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
879 Previously it only applied to the main-section connection policy
882 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
884 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
885 by me. Added RFC7919 DH primes as an alternative.
887 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
888 are not in the system include path.
890 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
891 GnuTLS, when a session startup failed (eg because the client disconnected)
892 Exim did stdio operations after fclose. This was exposed by a recent
893 change which nulled out the file handle after the fclose.
895 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
896 signed directly by the cert-signing cert, rather than an intermediate
897 OCSP-signing cert. This is the model used by LetsEncrypt.
899 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
901 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
902 an incoming connection.
904 HS/02 Bug 1802: Do not half-close the connection after sending a request
907 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
908 fallback to "prime256v1".
910 JH/34 SECURITY: Use proper copy of DATA command in error message.
911 Could leak key material. Remotely exploitable. CVE-2016-9963.
917 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
918 and 3.4.4 - once the server is enabled to respond to an OCSP request
919 it does even when not requested, resulting in a stapling non-aware
920 client dropping the TLS connection.
922 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
923 support variable-length bit vectors. No functional change.
925 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
926 The I= interface field on outgoing lines is now after the H= remote
927 host field, same as incoming lines. There is a separate
928 outgoing_interface log selector which allows you to disable the
931 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
932 If not running log_selector +smtp_connection the mainlog would be held
933 open indefinitely after a "too many connections" event, including to a
934 deleted file after a log rotate. Leave the per net connection logging
935 leaving it open for efficiency as that will be quickly detected by the
936 check on the next write.
938 HS/01 Bug 1671: Fix post transport crash.
939 Processing the wait-<transport> messages could crash the delivery
940 process if the message IDs didn't exist for some reason. When
941 using 'split_spool_directory=yes' the construction of the spool
942 file name failed already, exposing the same netto behaviour.
944 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
945 mime_regex ACL conditions.
947 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
948 to DSN fail messages (bounces): remote IP, remote greeting, remote response
949 to HELO, local diagnostic string.
951 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
952 log line to debug. Even when configured with a tls authenticator many
953 client connections are expected to not authenticate in this way, so
954 an authenticate fail is not an error.
956 HS/02 Add the Exim version string to the process info. This way exiwhat
957 gives some more detail about the running daemon.
959 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
960 matter for fast-change records such as DNSBLs.
962 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
963 retry record, even if constant. There may be multiple transports with
964 different interface settings and the retry behaviour needs to be kept
967 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
969 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
971 JH/10 Bug 840: fix log_defer_output option of pipe transport
973 JH/11 Bug 830: use same host for all RCPTS of a message, even under
974 hosts_randomize. This matters a lot when combined with mua_wrapper.
976 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
977 ${quote_pgsql:<string>} operator.
979 JH/13 Bug 1708: avoid misaligned access in cached lookup.
981 JH/14 Change header file name for freeradius-client. Relevant if compiling
982 with Radius support; from the Gentoo tree and checked under Fedora.
984 JH/15 Bug 1712: Introduce $prdr_requested flag variable
986 JH/16 Bug 1714: Permit an empty string as expansion result for transport
987 option transport_filter, meaning no filtering.
989 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
991 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
992 defaults to "*" (all hosts). The variable is now available when not built
993 with TLS, default unset, mainly to enable keeping the testsuite sane.
994 If a server certificate is not supplied (via tls_certificate) an error is
995 logged, and clients will find TLS connections fail on startup. Presumably
996 they will retry in-clear.
997 Packagers of Exim are strongly encouraged to create a server certificate
998 at installation time.
1000 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1001 with the $config_file variable.
1003 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1004 in transport context, after the attempt, and per-recipient. The latter type
1005 is per host attempted. The event data is the error message, and the errno
1006 information encodes the lookup type (A vs. MX) used for the (first) host,
1007 and the trailing two digits of the smtp 4xx response.
1009 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1010 to write to mainlog (or rejectlog, paniclog) in the window between file
1011 creation and permissions/ownership being changed. Particularly affects
1012 installations where exicyclog is run as root, rather than exim user;
1013 result is that the running daemon panics and dies.
1015 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1017 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1018 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1019 "pri" and "weight". Note that the previous implicit priority given by the
1020 list order is no longer honoured.
1022 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1023 for DKIM processing.
1025 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1026 by defining SUPPORT_SOCKS.
1028 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1029 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1030 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1031 variables are renamed to proxy_{local,external}_{address,port}.
1033 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1034 for a build by defining SUPPORT_I18N
1036 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1037 of the query string, and make ${quote_redis:} do that quoting.
1039 JH/29 Move Events support from Experimental to mainline, enabled by default
1040 and removable for a build by defining DISABLE_EVENT.
1042 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1044 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1045 cached by the daemon.
1047 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1048 by defining LOOKUP_REDIS. The libhiredis library is required.
1050 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1051 keys are given for lookup.
1053 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1054 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1055 only supported when built with TLS support. The PolarSSL SHA routines
1056 are still used when the TLS library is too old for convenient support.
1058 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1059 openssl_options), for security. OpenSSL forces this from version 1.1.0
1060 server-side so match that on older versions.
1062 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1063 allocation for $value could be released as the expansion processing
1064 concluded, but leaving the global pointer active for it.
1066 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1067 and to use the domains and local_parts ACL conditions.
1069 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1070 incorrectly not doubled on cutthrough transmission, hence seen as a
1071 body-termination at the receiving system - resulting in truncated mails.
1072 Commonly the sender saw a TCP-level error, and retransmitted the message
1073 via the normal store-and-forward channel. This could result in duplicates
1074 received - but deduplicating mailstores were liable to retain only the
1075 initial truncated version.
1077 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1079 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1081 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1082 we're in there, support oversigning also; bug 1309.
1084 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1086 HS/04 Add support for keep_environment and add_environment options.
1088 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1089 either intentional arithmetic overflow during PRNG, or testing config-
1092 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1093 delivery resulted in actual delivery. Cancel cutthrough before DATA
1096 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1097 rejects a recipient: pass the reject to the originator.
1099 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1100 Many were false-positives and ignorable, but it's worth fixing the
1103 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1104 for the new environment-manipulation done at startup. Move the routines
1105 from being local to tls.c to being global via the os.c file.
1107 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1108 an extract embedded as result-arg for a map, the first arg for extract
1109 is unavailable so we cannot tell if this is a numbered or keyed
1110 extraction. Accept either.
1116 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1119 JH/02 The smtp transport option "multi_domain" is now expanded.
1121 JH/03 The smtp transport now requests PRDR by default, if the server offers
1124 JH/04 Certificate name checking on server certificates, when exim is a client,
1125 is now done by default. The transport option tls_verify_cert_hostnames
1126 can be used to disable this per-host. The build option
1127 EXPERIMENTAL_CERTNAMES is withdrawn.
1129 JH/05 The value of the tls_verify_certificates smtp transport and main options
1130 default to the word "system" to access the system default CA bundle.
1131 For GnuTLS, only version 3.0.20 or later.
1133 JH/06 Verification of the server certificate for a TLS connection is now tried
1134 (but not required) by default. The verification status is now logged by
1135 default, for both outbound TLS and client-certificate supplying inbound
1138 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1141 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1142 Status Notification (bounce) messages are now MIME format per RFC 3464.
1143 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1144 under the control of the dsn_advertise_hosts option, and routers may
1145 have a dsn_lasthop option.
1147 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1148 default, modifiable by a malware= option. The list separator for
1149 the options can now be changed in the usual way. Bug 68.
1151 JH/10 The smtp_receive_timeout main option is now expanded before use.
1153 JH/11 The incoming_interface log option now also enables logging of the
1154 local interface on delivery outgoing connections.
1156 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1157 if the interface and destination host and port all match.
1159 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1162 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1163 Patch from Andrew Lewis.
1165 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1166 now supports optional time-restrictions, weighting, and priority
1167 modifiers per server. Patch originally by <rommer@active.by>.
1169 JH/16 The spamd_address main option now supports a mixed list of local
1170 and remote servers. Remote servers can be IPv6 addresses, and
1171 specify a port-range.
1173 JH/17 Bug 68: The spamd_address main option now supports an optional
1174 timeout value per server.
1176 JH/18 Bug 1581: Router and transport options headers_add/remove can
1177 now have the list separator specified.
1179 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1182 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1185 JH/21 Support for the A6 type of dns record is withdrawn.
1187 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1188 rather than the verbs used.
1190 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1191 from 255 to 1024 chars.
1193 JH/24 Verification callouts now attempt to use TLS by default.
1195 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1196 are generic router options now. The defaults didn't change.
1198 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1199 Original patch from Alexander Shikoff, worked over by JH.
1201 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1202 files if ZCAT_COMMAND is not executable.
1204 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1206 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1208 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1209 Normally benign, it bites when the pair was led to by a CNAME;
1210 modern usage is to not canonicalize the domain to a CNAME target
1211 (and we were inconsistent anyway for A-only vs AAAA+A).
1213 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1215 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1216 when evaluating $sender_host_dnssec.
1218 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1219 $sender_helo_dnssec variable.
1221 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1223 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1225 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1227 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1228 documented as working, but never had. Support all but $spam_report.
1230 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1231 added for tls authenticator.
1233 HS/03 Add perl_taintmode main config option
1239 TL/01 When running the test suite, the README says that variables such as
1240 no_msglog_check are global and can be placed anywhere in a specific
1241 test's script, however it was observed that placement needed to be near
1242 the beginning for it to behave that way. Changed the runtest perl
1243 script to read through the entire script once to detect and set these
1244 variables, reset to the beginning of the script, and then run through
1245 the script parsing/test process like normal.
1247 TL/02 The BSD's have an arc4random API. One of the functions to induce
1248 adding randomness was arc4random_stir(), but it has been removed in
1249 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1250 function when detected.
1252 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1253 cause callback expansion.
1255 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1256 syntax errors in an expansion can be treated as a string instead of
1257 logging or causing an error, due to the internal use of bool_lax
1258 instead of bool when processing it.
1260 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1261 server certificates when making smtp deliveries.
1263 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1265 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1267 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1269 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1270 Merged patch from Sebastian Wiedenroth.
1272 JH/05 Fix results-pipe from transport process. Several recipients, combined
1273 with certificate use, exposed issues where response data items split
1274 over buffer boundaries were not parsed properly. This eventually
1275 resulted in duplicates being sent. This issue only became common enough
1276 to notice due to the introduction of connection certificate information,
1277 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1279 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1280 size buffer was used, resulting in syntax errors when an expansion
1283 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1284 version 3.3.6 or later.
1286 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1287 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1288 both become "event_action", the variables become $event_name, $event_data
1289 and $event_defer_errno. There is a new variable $verify_mode, usable in
1290 routers, transports and related events. The tls:cert event is now also
1291 raised for inbound connections, if the main configuration event_action
1294 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1295 early OCSP support, but no stapling (appears to be less than 1.0.0).
1297 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1298 server certificate names available under the smtp transport option
1299 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1302 JH/10 Time-related extraction expansions from certificates now use the main
1303 option "timezone" setting for output formatting, and are consistent
1304 between OpenSSL and GnuTLS compilations. Bug 1541.
1306 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1307 encoded parameter in the incoming message. Bug 1558.
1309 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1310 include certificate info, eximon was claiming there were spoolfile
1313 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1315 JH/14 Log delivery-related information more consistently, using the sequence
1316 "H=<name> [<ip>]" wherever possible.
1318 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1319 are problematic for Debian distribution, omit them from the release
1322 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1324 JH/16 Fix string representation of time values on 64bit time_t architectures.
1327 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1328 output list separator was used.
1333 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1334 checkers that were complaining about end of non-void function with no
1337 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1338 This was a regression introduced in 4.83 by another bugfix.
1340 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1342 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1343 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1349 TF/01 Correctly close the server side of TLS when forking for delivery.
1351 When a message was received over SMTP with TLS, Exim failed to clear up
1352 the incoming connection properly after forking off the child process to
1353 deliver the message. In some situations the subsequent outgoing
1354 delivery connection happened to have the same fd number as the incoming
1355 connection previously had. Exim would try to use TLS and fail, logging
1356 a "Bad file descriptor" error.
1358 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1359 utilities have not been installed.
1361 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1362 temporary space as the ACL may create new global variables.
1364 TL/01 LDAP support uses per connection or global context settings, depending
1365 upon the detected version of the libraries at build time.
1367 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1368 to extract and use the src ip:port in logging and expansions as if it
1369 were a direct connection from the outside internet. PPv2 support was
1370 updated based on HAProxy spec change in May 2014.
1372 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1374 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1375 Properly escape header and check for NULL return.
1377 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1380 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1382 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1383 characters in header names, implemented as a verify condition.
1384 Contributed by Michael Fischer v. Mollard.
1386 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1387 results permerror and temperror. Previous values are deprecated but
1388 still accepted. In a future release, err_perm and err_temp will be
1389 completely removed, which will be a backward incompatibility if the
1390 ACL tests for either of these two old results. Patch contributed by
1391 user bes-internal on the mailing list.
1393 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1395 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1396 selectors, in both main and reject logs.
1398 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1401 JH/07 Add malware type "sock" for talking to simple daemon.
1403 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1405 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1406 routers/transports under cutthrough routing.
1408 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1409 numbers. Touch up "bool" conditional to keep the same definition.
1411 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1413 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1415 JH/12 Expand items in router/transport headers_add or headers_remove lists
1416 individually rather than the list as a whole. Bug 1452.
1418 Required for reasonable handling of multiple headers_ options when
1419 they may be empty; requires that headers_remove items with embedded
1420 colons must have them doubled (or the list-separator changed).
1422 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1423 view the policy declared in the DMARC record. Currently, $dmarc_status
1424 is a combined value of both the record presence and the result of the
1427 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1429 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1430 dnslookup router and the smtp transport (applying to the forward
1433 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1434 of ldap servers used for a specific lookup. Patch provided by Heiko
1437 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1438 New variable $lookup_dnssec_authenticated for observability.
1440 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1441 Patch submitted by Lars Timman.
1443 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1445 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1446 Requires trusted mode and valid format message id, aborts otherwise.
1447 Patch contributed by Heiko Schlichting.
1449 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1450 certextract with support for various fields. Bug 1358.
1452 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1453 is requested by default, modifiable by smtp transport option
1456 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1457 operate on certificate variables to give certificate fingerprints
1458 Also new ${sha256:cert_variable}.
1460 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1462 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1463 Christian Aistleitner.
1465 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1467 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1468 file. Patch from Wolfgang Breyha.
1470 JH/25 Expand the coverage of the delivery $host and $host_address to
1471 client authenticators run in verify callout. Bug 1476.
1473 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1474 align with daemon_smtp_ports. Bug 72.
1476 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1477 support and error reporting did not work properly.
1479 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1480 and is readable. Patch from Andrew Colin Kissa.
1482 TL/14 Enhance documentation of ${run expansion and how it parses the
1483 commandline after expansion, particularly in the case when an
1484 unquoted variable expansion results in an empty value.
1486 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1488 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1489 by renaming away from it. Addresses GH issue 15, reported by
1492 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1494 TL/15 SECURITY: prevent double expansion in math comparison functions
1495 (can expand unsanitized data). Not remotely exploitable.
1502 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1504 PP/02 Make -n do something, by making it not do something.
1505 When combined with -bP, the name of an option is not output.
1507 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1510 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1511 $sender_host_name and config options to manage this, and basic check
1514 PP/05 DSCP support for outbound connections and control modifier for inbound.
1516 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1517 (Only plugin which currently uses this is kerberos4, which nobody should
1518 be using, but we should make it available and other future plugins might
1519 conceivably use it, even though it would break NAT; stuff *should* be
1520 using channel bindings instead).
1522 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1523 name; added for Sendmail compatibility; requires admin caller.
1524 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1525 just ignore it); requires trusted caller.
1526 Also parse but ignore: -Ac -Am -X<logfile>
1529 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1531 TL/02 Add +smtp_confirmation as a default logging option.
1533 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1534 Patch by Magnus Holmgren from 2007-02-20.
1536 TL/04 Bugzilla 1281 - Spec typo.
1537 Bugzilla 1283 - Spec typo.
1538 Bugzilla 1290 - Spec grammar fixes.
1540 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1542 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1544 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1545 mailing list by by Dmitry Isaikin.
1547 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1549 JH/02 Support "G" suffix to numbers in ${if comparisons.
1551 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1553 NM/01 Bugzilla 1197 - Spec typo
1554 Bugzilla 1196 - Spec examples corrections
1556 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1558 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1559 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1562 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1563 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1565 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1566 "acl {{name}{arg}...}", and optional args on acl condition
1569 JH/05 Permit multiple router/transport headers_add/remove lines.
1571 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1573 JH/07 Avoid using a waiting database for a single-message-only transport.
1574 Performance patch from Paul Fisher. Bugzilla 1262.
1576 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1579 JH/09 Add $headers_added variable, with content from use of ACL modifier
1580 add_header (but not yet added to the message). Bugzilla 199.
1582 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1583 Pulled from Bugzilla 817 by Wolfgang Breyha.
1585 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1587 (nb: this is the same fix as in Exim 4.80.1)
1589 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1592 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1595 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1597 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1598 advertise SMTP AUTH mechanism to us, instead of a generic
1599 protocol violation error. Also, make Exim more robust to bad
1600 data from the Dovecot auth socket.
1602 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1604 When a queue runner is handling a message, Exim first routes the
1605 recipient addresses, during which it prunes them based on the retry
1606 hints database. After that it attempts to deliver the message to
1607 any remaining recipients. It then updates the hints database using
1610 So if a recipient address works intermittently, it can get repeatedly
1611 deferred at routing time. The retry hints record remains fresh so the
1612 address never reaches the final cutoff time.
1614 This is a fairly common occurrence when a user is bumping up against
1615 their storage quota. Exim had some logic in its local delivery code
1616 to deal with this. However it did not apply to per-recipient defers
1617 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1619 This change adds a proper retry rule check during routing so that the
1620 final cutoff time is checked against the message's age. We only do
1621 this check if there is an address retry record and there is not a
1622 domain retry record; this implies that previous attempts to handle
1623 the address had the retry_use_local_parts option turned on. We use
1624 this as an approximation for the destination being like a local
1625 delivery, as in LMTP.
1627 I suspect this new check makes the old local delivery cutoff check
1628 redundant, but I have not verified this so I left the code in place.
1630 TF/02 Correct gecos expansion when From: is a prefix of the username.
1632 Test 0254 submits a message to Exim with the header
1636 When I ran the test suite under the user fanf2, Exim expanded
1637 the header to contain my full name, whereas it should have added
1638 a Resent-Sender: header. It erroneously treats any prefix of the
1639 username as equal to the username.
1641 This change corrects that bug.
1643 GF/01 DCC debug and logging tidyup
1644 Error conditions log to paniclog rather than rejectlog.
1645 Debug lines prefixed by "DCC: " to remove any ambiguity.
1647 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1649 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1650 Bug spotted by Jeremy Harris; was flawed since initial commit.
1651 Would have resulted in OCSP responses post-SNI triggering an Exim
1652 NULL dereference and crash.
1654 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1656 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1657 Bug detection, analysis and fix by Samuel Thibault.
1658 Bugzilla 1331, Debian bug #698092.
1660 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1662 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1663 Server implementation by Todd Lyons, client by JH.
1664 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1665 config variable "prdr_enable" controls whether the server
1666 advertises the facility. If the client requests PRDR a new
1667 acl_data_smtp_prdr ACL is called once for each recipient, after
1668 the body content is received and before the acl_smtp_data ACL.
1669 The client is controlled by both of: a hosts_try_prdr option
1670 on the smtp transport, and the server advertisement.
1671 Default client logging of deliveries and rejections involving
1672 PRDR are flagged with the string "PRDR".
1674 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1675 fclose(). Diagnosis by Todd Lyons.
1677 PP/17 Update configure.default to handle IPv6 localhost better.
1678 Patch by Alain Williams (plus minor tweaks).
1681 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1682 This is now consistent with GnuTLS, and is now documented: the
1683 previous undocumented portable approach to treating the option as
1684 unset was to force an expansion failure. That still works, and
1685 an empty string is now equivalent.
1687 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1688 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1689 not performing validation itself.
1691 PP/20 Added force_command boolean option to pipe transport.
1692 Patch from Nick Koston, of cPanel Inc.
1694 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1697 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1699 PP/21 Fix eximon continuous updating with timestamped log-files.
1700 Broken in a format-string cleanup in 4.80, missed when I repaired the
1701 other false fix of the same issue.
1702 Report and fix from Heiko Schlichting.
1705 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1706 Report from Prashanth Katuri.
1708 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1709 It's SecureTransport, so affects any MacOS clients which use the
1710 system-integrated TLS libraries, including email clients.
1712 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1713 using a MIME ACL for non-SMTP local injection.
1714 Report and assistance in diagnosis by Warren Baker.
1716 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1718 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1720 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1721 last id that failed so it may be referenced in subsequent ACL's.
1723 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1726 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1727 ldap library initialization, allowing self-signed CA's to be
1728 used. Also properly sets require_cert option later in code by
1729 using NULL (global ldap config) instead of ldap handle (per
1730 session). Bug diagnosis and testing by alxgomz.
1732 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1733 the src/util/ subdirectory.
1735 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1736 renamed to Transport Post Delivery Action by Jeremy Harris, as
1739 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1740 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1741 redis_servers = needs to be configured which will be used by the redis
1742 lookup. Patch from Warren Baker, of The Packet Hub.
1744 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1746 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1747 hostname or reverse DNS when processing a host list. Used suggestions
1748 from multiple comments on this bug.
1750 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1752 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1753 Missed a few lines, added it to make the runtest require no keyboard
1756 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1757 contains upper case chars. Make router use caseful_local_part.
1759 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1760 support when GnuTLS has been built with p11-kit.
1766 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1768 This, or similar/improved, will also be change PP/11 of 4.82.
1774 PP/01 Handle short writes when writing local log-files.
1775 In practice, only affects FreeBSD (8 onwards).
1776 Bugzilla 1053, with thanks to Dmitry Isaikin.
1778 NM/01 Bugzilla 949 - Documentation tweak
1780 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1783 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1785 PP/02 Implemented gsasl authenticator.
1787 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1789 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1790 `pkg-config foo` for cflags/libs.
1792 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1793 with rest of GSASL and with heimdal_gssapi.
1795 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1796 `pkg-config foo` for cflags/libs for the TLS implementation.
1798 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1799 properties get this fed in as external SSF. A number of robustness
1800 and debugging improvements to the cyrus_sasl authenticator.
1802 PP/08 cyrus_sasl server now expands the server_realm option.
1804 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1805 Patch by Jeremy Harris.
1807 PP/10 Added dbmjz lookup type.
1809 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1811 PP/12 MAIL args handles TAB as well as SP, for better interop with
1812 non-compliant senders.
1813 Analysis and variant patch by Todd Lyons.
1815 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1816 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1817 Patch from Dirk Mueller <dmueller@suse.com>
1819 PP/13 tls_peerdn now print-escaped for spool files.
1820 Observed some $tls_peerdn in wild which contained \n, which resulted
1821 in spool file corruption.
1823 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1824 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1825 or write after TLS renegotiation, which otherwise led to messages
1828 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1829 as a tracking header (ie: a signed header comes before the signature).
1830 Patch from Wolfgang Breyha.
1832 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1833 comma-sep list; embedded commas doubled.
1835 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1837 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1839 Report and patch from Dmitry Banschikov.
1841 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1842 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1843 failures. We appear to now support TLS1.1+ with Exim.
1845 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1846 lets Exim select keys and certificates based upon TLS SNI from client.
1847 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1848 before an outbound SMTP session. New log_selector, +tls_sni.
1850 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1851 NULL dereference. Report and patch from Alun Jones.
1853 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1854 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1855 Not seeing resolver debug output on NetBSD, but suspect this is a
1856 resolver implementation change.
1858 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1859 Left warnings. Added "eximon gdb" invocation mode.
1861 PP/21 Defaulting "accept_8bitmime" to true, not false.
1863 PP/22 Added -bw for inetd wait mode support.
1865 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1866 locate the relevant includes and libraries. Made this the default.
1868 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1869 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1871 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1872 This may cause build issues on older platforms.
1874 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1875 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1876 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1877 Added SNI support via GnuTLS too.
1878 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1880 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1882 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1883 Applied second patch from Janne, implementing suggestion to default
1884 multiple-strings-in-record handling to match SPF spec.
1886 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1888 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1889 read-only, out of scope).
1890 Patch from Wolfgang Breyha, report from Stuart Northfield.
1892 PP/29 Fix three issues highlighted by clang analyser static analysis.
1893 Only crash-plausible issue would require the Cambridge-specific
1894 iplookup router and a misconfiguration.
1895 Report from Marcin Mirosław.
1897 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1899 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1900 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1901 As part of this, removing so much warning spew let me fix some minor
1902 real issues in debug logging.
1904 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1905 assignment on my part. Fixed.
1907 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1908 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1909 Janne Snabb (who went above and beyond: thank you).
1911 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1912 string otherwise requires a connection and a bunch more work and it's
1913 relatively easy to get wrong. Should also expose TLS library linkage
1916 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1917 64-bit ${eval} (JH/03).
1919 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1920 GNU libc to support some of the 64-bit stuff, should not lead to
1921 conflicts. Defined before os.h is pulled in, so if a given platform
1922 needs to override this, it can.
1924 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1925 protection layer was required, which is not implemented.
1926 Bugzilla 1254, patch from Wolfgang Breyha.
1928 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1929 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1930 tls_dhparam take prime identifiers. Also unbreak combination of
1931 OpenSSL+DH_params+TLSSNI.
1933 PP/39 Disable SSLv2 by default in OpenSSL support.
1939 PP/01 Solaris build fix for Oracle's LDAP libraries.
1940 Bugzilla 1109, patch from Stephen Usher.
1942 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1944 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1947 TF/02 Fix a couple more cases where we did not log the error message
1948 when unlink() failed. See also change 4.74-TF/03.
1950 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1951 lock up or crash if it happened to be inside a call to libc when it
1952 got a SIGUSR1 from exiwhat.
1954 The SIGUSR1 handler appends the current process status to the process
1955 log which is later printed by exiwhat. It used to use the general
1956 purpose logging code to do this, but several functions it calls are
1957 not safe for signals.
1959 The new output code in the SIGUSR1 handler is specific to the process
1960 log, and simple enough that it's easy to inspect for signal safety.
1961 Removing some special cases also simplifies the general logging code.
1962 Removing the spurious timestamps from the process log simplifies
1965 TF/04 Improved ratelimit ACL condition.
1967 The /noupdate option has been deprecated in favour of /readonly which
1968 has clearer semantics. The /leaky, /strict, and /readonly update modes
1969 are mutually exclusive. The update mode is no longer included in the
1970 database key; it just determines when the database is updated. (This
1971 means that when you upgrade Exim will forget old rate measurements.)
1973 Exim now checks that the per_* options are used with an update mode that
1974 makes sense for the current ACL. For example, when Exim is processing a
1975 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1976 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1977 must specify per_mail/readonly. If you omit the update mode it defaults to
1978 /leaky where that makes sense (as before) or /readonly where required.
1980 The /noupdate option is now undocumented but still supported for
1981 backwards compatibility. It is equivalent to /readonly except that in
1982 ACLs where /readonly is required you may specify /leaky/noupdate or
1983 /strict/noupdate which are treated the same as /readonly.
1985 A useful new feature is the /count= option. This is a generalization
1986 of the per_byte option, so that you can measure the throughput of other
1987 aggregate values. For example, the per_byte option is now equivalent
1988 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1990 The per_rcpt option has been generalized using the /count= mechanism
1991 (though it's more complicated than the per_byte equivalence). When it is
1992 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1993 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1994 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1995 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1996 Note that using per_rcpt with a non-readonly update mode in more than
1997 one ACL will cause the recipients to be double-counted. (The per_mail
1998 and per_byte options don't have this problem.)
2000 The handling of very low rates has changed slightly. If the computed rate
2001 is less than the event's count (usually one) then this event is the first
2002 after a long gap. In this case the rate is set to the same as this event's
2003 count, so that the first message of a spam run is counted properly.
2005 The major new feature is a mechanism for counting the rate of unique
2006 events. The new per_addr option counts the number of different
2007 recipients that someone has sent messages to in the last time period. It
2008 behaves like per_rcpt if all the recipient addresses are different, but
2009 duplicate recipient addresses do not increase the measured rate. Like
2010 the /count= option this is a general mechanism, so the per_addr option
2011 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2012 example, measure the rate that a client uses different sender addresses
2013 with the options per_mail/unique=$sender_address. There are further
2014 details in the main documentation.
2016 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2018 TF/06 Removed a few PCRE remnants.
2020 TF/07 Automatically extract Exim's version number from tags in the git
2021 repository when doing development or release builds.
2023 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2024 Bugzilla 879. Patch from Paul Fisher.
2026 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2027 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2030 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2032 PP/05 Variable $av_failed, true if the AV scanner deferred.
2033 Bugzilla 1078. Patch from John Horne.
2035 PP/06 Stop make process more reliably on build failure.
2036 Bugzilla 1087. Patch from Heiko Schlittermann.
2038 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2039 Bugzilla 1089. Patch from Heiko Schlittermann.
2041 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2042 Bugzilla 1131. Patch from Holger Weiß.
2044 PP/09 Handle IPv6 addresses with SPF.
2045 Bugzilla 860. Patch from Wolfgang Breyha.
2047 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2049 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2052 PP/11 match_* no longer expand right-hand-side by default.
2053 New compile-time build option, EXPAND_LISTMATCH_RHS.
2054 New expansion conditions, "inlist", "inlisti".
2056 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2058 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2060 PP/14 fix log_write() format string regression from TF/03.
2061 Bugzilla 1152. Patch from Dmitry Isaikin.
2067 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2069 PP/02 Harmonised TLS library version reporting; only show if debugging.
2070 Layout now matches that introduced for other libraries in 4.74 PP/03.
2072 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2074 PP/04 New "dns_use_edns0" global option.
2076 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2079 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2080 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2082 TK/01 Updated PolarSSL code to 0.14.2.
2083 Bugzilla 1097. Patch from Andreas Metzler.
2085 PP/07 Catch divide-by-zero in ${eval:...}.
2086 Fixes bugzilla 1102.
2088 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2091 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2092 format-string attack -- SECURITY: remote arbitrary code execution.
2094 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2095 time unintentionally subject to list matching rules, letting the header
2096 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2097 arbitrary string expansion). This allowed for information disclosure.
2099 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2100 INT_MIN/-1 -- value coerced to INT_MAX.
2106 NM/01 Workaround for PCRE version dependency in version reporting
2109 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2110 This fixes portability to compilers other than gcc, notably
2111 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2113 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2114 makefiles for portability to HP-UX and POSIX correctness.
2116 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2117 Also via indented variable definition in the Makefile.
2118 (Debugging by Oliver Heesakkers).
2120 PP/02 Restore caching of spamd results with expanded spamd_address.
2121 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2123 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2124 Improves build reliability. Fix from: Frank Elsner
2126 NM/02 Fix wide character breakage in the rfc2047 coding
2127 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2129 NM/03 Allow underscore in dnslist lookups
2130 Fixes bug 1026. Patch from Graeme Fowler
2132 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2133 Code patches from Adam Ciarcinski of NetBSD.
2135 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2138 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2139 is logged, to avoid truncation. Patch from John Horne.
2141 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2142 Patch from Jakob Hirsch.
2144 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2145 SQL string expansion failure details.
2146 Patch from Andrey Oktyabrski.
2148 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2149 Patch from Simon Arlott.
2151 PP/09 New lookups functionality failed to compile on old gcc which rejects
2152 extern declarations in function scope.
2153 Patch from Oliver Fleischmann
2155 PP/10 Use sig_atomic_t for flags set from signal handlers.
2156 Check getgroups() return and improve debugging.
2157 Fixed developed for diagnosis in bug 927 (which turned out to be
2160 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2161 Patch from Mark Zealey.
2163 PP/12 Bugzilla 1056: Improved spamd server selection.
2164 Patch from Mark Zealey.
2166 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2167 Based on patch from Heiko Schlittermann.
2169 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2170 Patch from Uwe Doering, sign-off by Michael Haardt.
2172 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2173 variable declaration deep within a block. Bug and patch from
2176 PP/15 lookups-Makefile IRIX compatibility coercion.
2178 PP/16 Make DISABLE_DKIM build knob functional.
2180 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2181 Patch by Simon Arlott
2183 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2184 variable argument macros. Our copy now differs from upstream.
2190 TF/01 Failure to get a lock on a hints database can have serious
2191 consequences so log it to the panic log.
2193 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2194 controlled using the smtp_confirmation log selector.
2196 TF/03 Include the error message when we fail to unlink a spool file.
2198 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2199 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2200 for maintaining out-of-tree patches for some time.
2202 PP/01 Bugzilla 139: Documentation and portability issues.
2203 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2204 Handle per-OS dynamic-module compilation flags.
2206 PP/02 Let /dev/null have normal permissions.
2207 The 4.73 fixes were a little too stringent and complained about the
2208 permissions on /dev/null. Exempt it from some checks.
2209 Reported by Andreas M. Kirchwitz.
2211 PP/03 Report version information for many libraries, including
2212 Exim version information for dynamically loaded libraries. Created
2213 version.h, now support a version extension string for distributors
2214 who patch heavily. Dynamic module ABI change.
2216 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2217 privilege escalation vulnerability whereby the Exim run-time user
2218 can cause root to append content of the attacker's choosing to
2221 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2224 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2225 If dropping privileges for untrusted macros, we disabled normal logging
2226 on the basis that it would fail; for the Exim run-time user, this is not
2227 the case, and it resulted in successful deliveries going unlogged.
2228 Fixed. Reported by Andreas Metzler.
2234 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2235 only prepend for the Resent-* case. Fixes regression introduced in
2236 Exim 4.70 by NM/22 for Bugzilla 607.
2238 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2239 increasing numbers of administrators be bitten by this.
2241 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2243 PP/03 Bugzilla 994: added openssl_options main configuration option.
2245 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2247 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2249 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2251 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2252 without a peer certificate, leading to a segfault because of an
2253 assumption that peers always have certificates. Be a little more
2254 paranoid. Problem reported by Martin Tscholak.
2256 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2257 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2258 NB: ClamAV planning to remove STREAM in "middle of 2010".
2259 CL also introduces -bmalware, various -d+acl logging additions and
2260 more caution in buffer sizes.
2262 PP/09 Implemented reverse_ip expansion operator.
2264 PP/10 Bugzilla 937: provide a "debug" ACL control.
2266 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2268 PP/12 Bugzilla 973: Implement --version.
2270 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2272 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2274 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2276 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2277 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2278 ignore trailing whitespace.
2280 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2282 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2285 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2286 Notification from Dr Andrew Aitchison.
2288 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2289 ExtendedDetectionInfo response format.
2290 Notification from John Horne.
2292 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2295 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2296 XSL and documented dependency on system catalogs, with examples of how
2299 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2302 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2303 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2304 configuration file which is writeable by the Exim user or group.
2306 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2307 of configuration files to cover files specified with the -C option if
2308 they are going to be used with root privileges, not just the default
2311 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2312 option (effectively making it always true).
2314 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2315 files to be used while preserving root privileges.
2317 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2318 that rogue child processes cannot use them.
2320 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2321 run-time user, instead of root.
2323 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2324 Exim run-time user without dropping privileges.
2326 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2327 result string, instead of calling string_vformat() twice with the same
2330 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2331 for other users. Others should always drop root privileges if they use
2332 -C on the command line, even for a whitelisted configure file.
2334 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2336 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2342 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2343 $data_path, and $header_path variables; fixed documentation bugs and
2346 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2347 exipick to access non-standard spools, including the "frozen" queue
2350 NM/01 Bugzilla 965: Support mysql stored procedures.
2351 Patch from Alain Williams
2353 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2355 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2356 Patch from Andreas Metzler
2358 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2359 Patch from Kirill Miazine
2361 NM/05 Bugzilla 671: Added umask to procmail example.
2363 JJ/03 installed exipick 20100323.0, fixing doc bug
2365 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2366 directory. Notification and patch from Dan Rosenberg.
2368 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2370 TK/02 Improve log output when DKIM signing operation fails.
2372 MH/01 Treat the transport option dkim_domain as a colon separated
2373 list, not as a single string, and sign the message with each element,
2374 omitting multiple occurences of the same signer.
2376 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2377 Bugzilla 985, 986. Patch by Simon Arlott
2379 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2380 Patch by Simon Arlott
2382 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2383 MBX locking. Notification from Dan Rosenberg.
2389 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2391 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2393 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2395 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2397 NM/04 Bugzilla 915: Flag broken perl installation during build.
2403 TK/01 Added patch by Johannes Berg that expands the main option
2404 "spamd_address" if it starts with a dollar sign.
2406 TK/02 Write list of recipients to X-Envelope-Sender header when building
2407 the mbox-format spool file for content scanning (suggested by Jakob
2410 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2411 (http://www.dcc-servers.net/) support via dccifd. Activated by
2412 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2414 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2415 by Mark Daniel Reidel <mr@df.eu>.
2417 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2418 When building exim an external PCRE library is now needed -
2419 PCRE is a system library on the majority of modern systems.
2420 See entry on PCRE_LIBS in EDITME file.
2422 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2423 conversation. Added nologin parameter to request.
2424 Patch contributed by Kirill Miazine.
2426 TF/01 Do not log submission mode rewrites if they do not change the address.
2428 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2430 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2431 log files in place. Contributed by Roberto Lima.
2433 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2435 TF/03 Bugzilla 615: When checking the local_parts router precondition
2436 after a local_part_suffix or local_part_prefix option, Exim now
2437 does not use the address's named list lookup cache, since this
2438 contains cached lookups for the whole local part.
2440 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2441 Robert Millan. Documentation is in experimental-spec.txt.
2443 TF/04 Bugzilla 668: Fix parallel build (make -j).
2445 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2447 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2448 Patch provided by Jan Srzednicki.
2450 TF/05 Leading white space used to be stripped from $spam_report which
2451 wrecked the formatting. Now it is preserved.
2453 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2454 that they are available at delivery time.
2456 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2458 TF/08 TLS error reporting now respects the incoming_interface and
2459 incoming_port log selectors.
2461 TF/09 Produce a more useful error message if an SMTP transport's hosts
2462 setting expands to an empty string.
2464 NM/06 Bugzilla 744: EXPN did not work under TLS.
2465 Patch provided by Phil Pennock.
2467 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2468 Patch provided by Richard Godbee.
2470 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2471 acl_smtp_notquit, added index entry.
2473 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2474 Patch provided by Eugene Bujak.
2476 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2477 accept(). Patch provided by Maxim Dounin.
2479 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2480 Patch provided by Phil Pennock.
2482 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2484 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2485 Patch provided by Brad "anomie" Jorsch.
2487 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2488 Patch provided by Dean Brooks.
2490 TK/05 Add native DKIM support (does not depend on external libraries).
2492 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2493 Patch provided by Graeme Fowler.
2495 NM/16 Bugzilla 851: Documentation example syntax fix.
2497 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2499 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2502 NM/19 Bugzilla 745: TLS version reporting.
2503 Patch provided by Phil Pennock.
2505 NM/20 Bugzilla 167: bool: condition support.
2506 Patch provided by Phil Pennock.
2508 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2509 clients. Patch provided by Phil Pennock.
2511 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2512 Patch provided by Brad "anomie" Jorsch.
2514 NM/23 Bugzilla 687: Fix misparses in eximstats.
2515 Patch provided by Heiko Schlittermann.
2517 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2518 Patch provided by Heiko Schlittermann.
2520 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2521 plus update to original patch.
2523 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2525 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2526 Patch provided by David Brownlee.
2528 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2530 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2532 NM/30 Bugzilla 888: TLS documentation bugfixes.
2534 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2536 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2537 Unlike the original bugzilla I have changed all shell scripts in src tree.
2539 NM/33 Bugzilla 898: Transport filter timeout fix.
2540 Patch by Todd Rinaldo.
2542 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2543 Patch by Serge Demonchaux.
2545 NM/35 Bugzilla 39: Base64 decode bug fixes.
2546 Patch by Jakob Hirsch.
2548 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2550 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2552 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2554 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2560 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2561 ALT-N's libdkim that I have put here:
2562 http://duncanthrax.net/exim-experimental/
2564 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2565 were called 'true' and it seems that C99 defines that as a reserved
2566 keyword to be used with 'bool' variable types. That means you could
2567 not include C99-style headers which use bools without triggering
2568 build errors in sieve.c.
2570 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2571 as mailq or other aliases. Changed the --help handling significantly
2572 to do whats expected. exim_usage() emits usage/help information.
2574 SC/01 Added the -bylocaldomain option to eximstats.
2576 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2578 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2580 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2586 PH/01 Another patch from the Sieve maintainer.
2588 PH/02 When an IPv6 address is converted to a string for single-key lookup
2589 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2590 dots are used instead of colons so that keys in lsearch files need not
2591 contain colons. This was done some time before quoting was made available
2592 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2593 (notated using the quote facility) so as to distinguish them from IPv4
2594 keys. This meant that lookups for IP addresses in host lists did not work
2595 for iplsearch lookups.
2597 This has been fixed by arranging for IPv6 addresses to be expressed with
2598 colons if the lookup type is iplsearch. This is not incompatible, because
2599 previously such lookups could never work.
2601 The situation is now rather anomalous, since one *can* have colons in
2602 ordinary lsearch keys. However, making the change in all cases is
2603 incompatible and would probably break a number of configurations.
2605 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2608 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2609 conversion specification without a maximum field width, thereby enabling
2610 a rogue spamd server to cause a buffer overflow. While nobody in their
2611 right mind would setup Exim to query an untrusted spamd server, an
2612 attacker that gains access to a server running spamd could potentially
2613 exploit this vulnerability to run arbitrary code as the Exim user.
2615 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2616 $primary_hostname instead of what libspf2 thinks the hosts name is.
2618 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2619 a directory entry by the name of the lookup key. Previously, if a
2620 symlink pointed to a non-existing file or a file in a directory that
2621 Exim lacked permissions to read, a lookup for a key matching that
2622 symlink would fail. Now it is enough that a matching directory entry
2623 exists, symlink or not. (Bugzilla 503.)
2625 PH/03 The body_linecount and body_zerocount variables are now exported in the
2628 PH/04 Added the $dnslist_matched variable.
2630 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2631 This means they are set thereafter only if the connection becomes
2634 PH/06 Added the client_condition to authenticators so that some can be skipped
2635 by clients under certain conditions.
2637 PH/07 The error message for a badly-placed control=no_multiline_responses left
2638 "_responses" off the end of the name.
2640 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2642 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2643 (without spaces) instead of just copying the configuration text.
2645 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2647 PH/11 Added $max_received_linelength.
2649 PH/12 Added +ignore_defer and +include_defer to host lists.
2651 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2652 way in which PCRE > 7.0 is built.
2654 PH/14 Implemented queue_only_load_latch.
2656 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2657 MAIL command. The effect was to mangle the value on 64-bit systems.
2659 PH/16 Another patch from the Sieve maintainer.
2661 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2663 PH/18 If a system quota error occurred while trying to create the file for
2664 a maildir delivery, the message "Mailbox is full" was not appended to the
2665 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2666 only to a quota excession during the actual writing of the file.
2668 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2669 characters?) which causes problems in log lines. The DN values are now
2670 passed through string_printing() before being added to log lines.
2672 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2673 and InterBase are left for another time.)
2675 PH/21 Added message_body_newlines option.
2677 PH/22 Guard against possible overflow in moan_check_errorcopy().
2679 PH/23 POSIX allows open() to be a macro; guard against that.
2681 PH/24 If the recipient of an error message contained an @ in the local part
2682 (suitably quoted, of course), incorrect values were put in $domain and
2683 $local_part during the evaluation of errors_copy.
2689 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2690 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2693 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2694 issue a MAIL command.
2696 PH/02 In an ACL statement such as
2698 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2700 if a client was not listed at all, or was listed with a value other than
2701 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2702 the condition was not true (as it should be), so access was not denied.
2703 The bug was that the ! inversion was incorrectly passed on to the second
2704 item. This has been fixed.
2706 PH/03 Added additional dnslists conditions == and =& which are different from
2707 = and & when the dns lookup returns more than one IP address.
2709 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2710 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2712 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2713 FSYNC, which compiles an option called disable_fsync that allows for
2714 bypassing fsync(). The documentation is heavily laced with warnings.
2716 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2718 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2719 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2720 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2721 including adding "make clean"; (3) Added -fPIC when compiling the test
2722 dynamically loaded module, to get rid of a warning.
2724 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2725 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2726 = 0s. The bug is otherwise harmless.
2728 PH/07 There was a bug in the dovecot authenticator such that the value of
2729 $auth1 could be overwritten, and so not correctly preserved, after a
2730 successful authentication. This usually meant that the value preserved by
2731 the server_setid option was incorrect.
2733 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2735 PH/09 Installed PCRE release 7.0.
2737 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2738 run for batched SMTP input. It is now run at the start of every message
2739 in the batch. While fixing this I discovered that the process information
2740 (output by running exiwhat) was not always getting set for -bs and -bS
2741 input. This is fixed, and it now also says "batched" for BSMTP.
2743 PH/11 Added control=no_pipelining.
2745 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2746 patch, slightly modified), and move the expansion of helo_data till after
2747 the connection is made in the smtp transport (so it can use these
2750 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2752 PH/14 Added log_selector = +pid.
2754 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2756 PH/16 Add ${if forany and ${if forall.
2758 PH/17 Added dsn_from option to vary the From: line in DSNs.
2760 PH/18 Flush SMTP output before performing a callout, unless control =
2761 no_callout_flush is set.
2763 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2764 was true (the default) a successful delivery failed to delete the retry
2765 item, thus causing premature timeout of the address. The bug is now
2768 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2770 PH/21 Long custom messages for fakedefer and fakereject are now split up
2771 into multiline responses in the same way that messages for "deny" and
2772 other ACL rejections are.
2774 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2775 with slight modification.
2777 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2778 draft, changing the syntax and factoring some duplicate code".
2780 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2781 for deliveries of the second and subsequent messages over the same SMTP
2784 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2785 ${reduce, with only minor "tidies".
2787 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2789 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2790 expansion side effects.
2792 PH/27 When a message times out after an over-quota error from an Exim-imposed
2793 quota, the bounce message says "mailbox is full". This message was not
2794 being given when it was a system quota that was exceeded. It now should
2797 MH/03 Made $recipients available in local_scan(). local_scan() already has
2798 better access to the recipient list through recipients_list[], but
2799 $recipients can be useful in postmaster-provided expansion strings.
2801 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2802 in the case of a MAIL command with additional options following the
2803 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2804 were accidentally chopped off.
2806 PH/29 SMTP synchronization checks are implemented when a command is read -
2807 there is a check that no more input is waiting when there shouldn't be
2808 any. However, for some commands, a delay in an ACL can mean that it is
2809 some time before the response is written. In this time, more input might
2810 arrive, invalidly. So now there are extra checks after an ACL has run for
2811 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2812 pipelining has not been advertised.
2814 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2816 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2817 returned in the SMTP response when smtp_return_error_details was false.
2818 This has been fixed.
2820 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2821 instead of the C I/O that was originally supplied, because problems were
2822 reported on Solaris.
2824 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2825 Exim which did not show up earlier: it was assuming that a call to
2826 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2827 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2828 was a macro that became an assignment, so it seemed to work. This has
2829 changed to a proper function call with a void return, hence the compile
2830 error. Exim's code has been fixed.
2832 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2835 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2837 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2839 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2840 because it turns out to be too big or there is a timeout) there is no
2841 "Completed" line in the log. When some messages of this type were
2842 selected by exigrep, they were listed as "not completed". Others were
2843 picked up by some special patterns. I have improved the selection
2844 criteria to be more general.
2846 PH/38 The host_find_failed option in the manualroute router can now be set
2847 to "ignore", to completely ignore a host whose IP address cannot be
2848 found. If all hosts are ignored, the behaviour is controlled by the new
2849 host_all_ignored option.
2851 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2852 homing or because of multiple MX records with /mx) generated more than
2853 one IP address, and the following item turned out to be the local host,
2854 all the secondary addresses of the first item were incorrectly removed
2855 from the list, along with the local host and any following hosts (which
2856 is what is supposed to happen).
2858 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2859 whoever called Exim into the -H file. In the case of the daemon it was
2860 behaving confusingly. When first started, it used values for whoever
2861 started the daemon, but after a SIGHUP it used the Exim user (because it
2862 calls itself on a restart). I have changed the code so that it now always
2865 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2866 message are rejected with the same error (e.g. no authentication or bad
2867 sender address), and a DATA command is nevertheless sent (as can happen
2868 with PIPELINING or a stupid MUA), the error message that was given to the
2869 RCPT commands is included in the rejection of the DATA command. This is
2870 intended to be helpful for MUAs that show only the final error to their
2873 PH/42 Another patch from the Sieve maintainer.
2875 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2876 Eximstats - Fixed some broken HTML links and added missing column headers
2878 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2879 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2881 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2883 PH/43 Yet another patch from the Sieve maintainer.
2885 PH/44 I found a way to check for a TCP/IP connection going away before sending
2886 the response to the final '.' that terminates a message, but only in the
2887 case where the client has not sent further data following the '.'
2888 (unfortunately, this is allowed). However, in many cases there won't be
2889 any further data because there won't be any more messages to send. A call
2890 to select() can be used: if it shows that the input is "ready", there is
2891 either input waiting, or the socket has been closed. An attempt to read
2892 the next input character can distinguish the two cases. Previously, Exim
2893 would have sent an OK response which the client would never have see.
2894 This could lead to message repetition. This fix should cure that, at
2895 least in a lot of common cases.
2897 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2898 advertised in response to EHLO.
2904 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2905 fixed by 4.65/MH/01 (is this a record?) are fixed:
2907 (i) An empty string was always treated as zero by the numeric comparison
2908 operators. This behaviour has been restored.
2910 (ii) It is documented that the numeric comparison operators always treat
2911 their arguments as decimal numbers. This was broken in that numbers
2912 starting with 0 were being interpreted as octal.
2914 While fixing these problems I realized that there was another issue that
2915 hadn't been noticed. Values of message_size_limit (both the global option
2916 and the transport option) were treated as octal if they started with 0.
2917 The documentation was vague. These values are now always treated as
2918 decimal, and I will make that clear in the documentation.
2924 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2925 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2928 MH/01 Don't check that the operands of numeric comparison operators are
2929 integers when their expansion is in "skipping" mode (fixes bug
2930 introduced by 4.64-PH/07).
2932 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2933 child addresses, Exim now panics and dies. Previously, because the count
2934 is held in a short int, deliveries were likely to be lost. As such a
2935 large number of recipients for a single message is ridiculous
2936 (performance will be very, very poor), I have chosen to impose a limit
2937 rather than extend the field.
2943 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2944 leftover -K file (the existence of which was triggered by #402).
2945 While we were at it, introduced process PID as part of the -K
2946 filename. This should rule out race conditions when creating
2949 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2950 processing considerably. Previous code took too long for large mails,
2951 triggering a timeout which in turn triggers #401.
2953 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2954 in the DK code in transports.c. sendfile() is not really portable,
2955 hence the _LINUX specificness.
2957 TF/01 In the add_headers option to the mail command in an Exim filter,
2958 there was a bug that Exim would claim a syntax error in any
2959 header after the first one which had an odd number of characters
2962 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2963 callout verification, Exim cached a "reject" for the entire domain. This
2964 is correct for most verifications, but it is not correct for a recipient
2965 verification with use_sender or use_postmaster set, because in that case
2966 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2967 case of MAIL FROM:<> rejection from other early rejections (e.g.
2968 rejection of HELO). When verifying a recipient using a non-null MAIL
2969 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2970 Whatever the result of the callout, the value of the domain cache is
2971 left unchanged (for any other kind of callout, getting as far as trying
2972 RCPT means that the domain itself is ok).
2974 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2977 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2978 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2979 session, the daemon ignores ECONNECT errors and logs others; it now
2980 ignores EPIPE as well.
2982 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2983 (quoted-printable decoding).
2985 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2986 later the small subsequent patch to fix an introduced bug.
2988 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2990 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2992 PH/08 An error is now given if message_size_limit is specified negative.
2994 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2995 to be given (somewhat) arbitrary names.
2997 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3000 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3001 miscellaneous code fixes
3003 PH/10 Added the log_reject_target ACL modifier to specify where to log
3006 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3007 hostname. This is wrong, because it relates to the incoming message (and
3008 probably the interface on which it is arriving) and not to the outgoing
3009 callout (which could be using a different interface). This has been
3010 changed to use the value of the helo_data option from the smtp transport
3011 instead - this is what is used when a message is actually being sent. If
3012 there is no remote transport (possible with a router that sets up host
3013 addresses), $smtp_active_hostname is used.
3015 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3016 tweaks were necessary in order to get it to work (see also 21 below):
3017 (a) The code assumed that strncpy() returns a negative number on buffer
3018 overflow, which isn't the case. Replaced with Exim's string_format()
3020 (b) There were several signed/unsigned issues. I just did the minimum
3021 hacking in of casts. There is scope for a larger refactoring.
3022 (c) The code used strcasecmp() which is not a standard C function.
3023 Replaced with Exim's strcmpic() function.
3024 (d) The code set only $1; it now sets $auth1 as well.
3025 (e) A simple test gave the error "authentication client didn't specify
3026 service in request". It would seem that Dovecot has changed its
3027 interface. Fortunately there's a specification; I followed it and
3028 changed what the client sends and it appears to be working now.
3030 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3033 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3034 address A is aliased to B and C, where B exists and C does not. Without
3035 -v the output is "A verified" because verification stops after a
3036 successful redirection if more than one address is generated. However,
3037 with -v the child addresses are also verified. Exim was outputting "A
3038 failed to verify" and then showing the successful verification for C,
3039 with its parentage. It now outputs "B failed to verify", showing B's
3040 parentage before showing the successful verification of C.
3042 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3043 look up a TXT record in a specific list after matching in a combined
3046 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3047 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3048 they consult the DNS. I had assumed they would set it the way they
3049 wanted; and indeed my experiments on Linux seem to show that in some
3050 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3051 To be on the safe side, however, I have now made the interface to
3052 host_find_byname() similar to host_find_bydns(), with an argument
3053 containing the DNS resolver options. The host_find_byname() function now
3054 sets these options at its start, just as host_find_bydns() does. The smtp
3055 transport options dns_qualify_single and dns_search_parents are passed to
3056 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3057 of host_find_byname() use the default settings of RES_DEFNAMES
3058 (qualify_single) but not RES_DNSRCH (search_parents).
3060 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3061 spool_read_header() do less string testing, by means of a preliminary
3062 switch on the second character of optional "-foo" lines. (This is
3063 overdue, caused by the large number of possibilities that now exist.
3064 Originally there were few.) While I was there, I also converted the
3065 str(n)cmp tests so they don't re-test the leading "-" and the first
3066 character, in the hope this might squeeze out yet more improvement.
3068 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3069 flag allowing group syntax was set by the header_syntax check but not
3070 turned off, possible causing trouble later; (2) The flag was not being
3071 set at all for the header_verify test, causing "group"-style headers to
3072 be rejected. I have now set it in this case, and also caused header_
3073 verify to ignore an empty address taken from a group. While doing this, I
3074 came across some other cases where the code for allowing group syntax
3075 while scanning a header line wasn't quite right (mostly, not resetting
3076 the flag correctly in the right place). These bugs could have caused
3077 trouble for malformed header lines. I hope it is now all correct.
3079 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3080 with the "reply" argument non-NULL. The code, however (which originally
3081 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3082 but it didn't always do it. This confused somebody who was copying the
3083 code for some other use. I have removed all the tests.
3085 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3086 feature that was used to support insecure browsers during the U.S. crypto
3087 embargo. It requires special client support, and Exim is probably the
3088 only MTA that supported it -- and would never use it because real RSA is
3089 always available. This code has been removed, because it had the bad
3090 effect of slowing Exim down by computing (never used) parameters for the
3091 RSA_EXPORT functionality.
3093 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3094 authenticator to fail if there's a tab character in the incoming data
3095 (there should never be unless someone is messing about, as it's supposed
3096 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3097 if the connection is using TLS or if the remote IP is the same as the
3098 local IP, and the "valid-client-cert option" if a client certificate has
3101 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3102 authenticators. This can be used for authorization after authentication
3103 succeeds. (In the case of plaintext, it servers for both authentication
3106 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3107 if any retry times were supplied.
3109 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3110 connection, where there is no client IP address to check. In this
3111 situation, the verify now always succeeds.
3113 PH/25 Applied John Jetmore's -Mset patch.
3115 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3117 PH/27 In a string expansion for a processed (not raw) header when multiple
3118 headers of the same name were present, leading whitespace was being
3119 removed from all of them, but trailing whitespace was being removed only
3120 from the last one. Now trailing whitespace is removed from each header
3121 before concatenation. Completely empty headers in a concatenation (as
3122 before) are ignored.
3124 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3125 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3127 PH/29 [Removed. This was a change that I later backed out, and forgot to
3128 correct the ChangeLog entry (that I had efficiently created) before
3129 committing the later change.]
3131 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3132 address errors (4xx response to RCPT) over the same connection as other
3133 messages routed to the same hosts. Such deliveries are always "forced",
3134 so retry times are not inspected. This resulted in far too many retries
3135 for the affected addresses. The effect occurred only when there were more
3136 hosts than the hosts_max_try setting in the smtp transport when it had
3137 the 4xx errors. Those hosts that it had tried were not added to the list
3138 of hosts for which the message was waiting, so if all were tried, there
3139 was no problem. Two fixes have been applied:
3141 (i) If there are any address or message errors in an SMTP delivery, none
3142 of the hosts (tried or untried) are now added to the list of hosts
3143 for which the message is waiting, so the message should not be a
3144 candidate for sending over the same connection that was used for a
3145 successful delivery of some other message. This seems entirely
3146 reasonable: after all the message is NOT "waiting for some host".
3147 This is so "obvious" that I'm not sure why it wasn't done
3148 previously. Hope I haven't missed anything, but it can't do any
3149 harm, as the worst effect is to miss an optimization.
3151 (ii) If, despite (i), such a delivery is accidentally attempted, the
3152 routing retry time is respected, so at least it doesn't keep
3153 hammering the server.
3155 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3156 in ${readsocket because some servers need this prod.
3158 PH/32 Added some extra debug output when updating a wait-xxx database.
3160 PH/33 The hint "could be header name not terminated by colon", which has been
3161 given for certain expansion errors for a long time, was not being given
3162 for the ${if def:h_colon_omitted{... case.
3164 PH/34 The spec says: "With one important exception, whenever a domain list is
3165 being scanned, $domain contains the subject domain." There was at least
3166 one case where this was not true.
3168 PH/35 The error "getsockname() failed: connection reset by peer" was being
3169 written to the panic log as well as the main log, but it isn't really
3170 panic-worthy as it just means the connection died rather early on. I have
3171 removed the panic log writing for the ECONNRESET error when getsockname()
3174 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3175 runs only) independently of the message's sender address. This meant
3176 that, if the 4xx error was in fact related to the sender, a different
3177 message to the same recipient with a different sender could confuse
3178 things. In particular, this can happen when sending to a greylisting
3179 server, but other circumstances could also provoke similar problems.
3180 I have changed the default so that the retry time for these errors is now
3181 based a combination of the sender and recipient addresses. This change
3182 can be overridden by setting address_retry_include_sender=false in the
3185 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3186 remote server are returned as part of bounce messages. This was not
3187 happening for LMTP over a pipe (the lmtp transport), but now it is the
3188 same for both kinds of LMTP.
3190 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3191 in header lines that were in fact CNAMEs. This is no longer the case.
3193 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3194 and queue runs started by the daemon processed all messages. This has
3195 been fixed so that -R and -S can now usefully be given with -q<time>.
3197 PH/40 Import PCRE release 6.7 (fixes some bugs).
3199 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3201 PH/42 Give an error if -q is specified more than once.
3203 PH/43 Renamed the variables $interface_address and $interface_port as
3204 $received_ip_address and $received_port, to make it clear that these
3205 values apply to message reception, and not to the outgoing interface when
3206 a message is delivered. (The old names remain recognized, of course.)
3208 PH/44 There was no timeout on the connect() call when using a Unix domain
3209 socket in the ${readsocket expansion. There now is.
3211 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3212 be meaningful with "accept".
3214 SC/01 Eximstats V1.43
3215 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3217 SC/02 Eximstats V1.44
3218 Use a glob alias rather than an array ref in the generated
3219 parser. This improves both readability and performance.
3221 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3222 Collect SpamAssassin and rejection statistics.
3223 Don't display local sender or destination tables unless
3224 there is data to show.
3225 Added average volumes into the top table text output.
3227 SC/04 Eximstats V1.46
3228 Collect data on the number of addresses (recipients)
3229 as well as the number of messages.
3231 SC/05 Eximstats V1.47
3232 Added 'Message too big' to the list of mail rejection
3233 reasons (thanks to Marco Gaiarin).
3235 SC/06 Eximstats V1.48
3236 Mainlog lines which have GMT offsets and are too short to
3237 have a flag are now skipped.
3239 SC/07 Eximstats V1.49 (Alain Williams)
3240 Added the -emptyok flag.
3242 SC/08 Eximstats V1.50
3243 Fixes for obtaining the IP address from reject messages.
3245 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3246 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3247 whitespace changes from 4.64-PH/27
3249 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3252 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3253 are found, allow negative numbers in numeric criteria)
3255 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3257 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3258 to match changes made in 4.64-PH/43
3260 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3262 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3263 "domain" is actually an IP address, and force a failure. This locks out
3264 those revolvers/nameservers that support "A-for-A" lookups, in
3265 contravention of the specifications.
3267 PH/48 When a host name was looked up from an IP address, and the subsequent
3268 forward lookup of the name timed out, the host name was left in
3269 $sender_host_name, contrary to the specification.
3271 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3272 restricted to single-key lookups, Exim was not diagnosing an error if
3273 * or *@ was used with a query-style lookup.
3275 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3277 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3278 long ago, but noone interested enough thought of it. Let's just say that
3279 the "1.1" means that there are some new functions that weren't there at
3280 some point in the past.
3282 PH/51 Error processing for expansion failure of helo_data from an smtp
3283 transport during callout processing was broken.
3285 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3286 tested/used via the -bh/-bhc/-bs options.
3288 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3289 bug, fixed in subsequent PCRE releases).
3291 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3292 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3294 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3300 SC/01 Use a glob alias rather than an array ref in eximstats generated
3301 parser. This improves both readability and performance.
3303 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3304 Don't display local sender or destination tables in eximstats unless
3305 there is data to show.
3306 Added average volumes into the eximstats top table text output.
3308 SC/03 Collect data on the number of addresses (recipients) as well
3309 as the number of messages in eximstats.
3311 TF/01 Correct an error in the documentation for the redirect router. Exim
3312 does (usually) call initgroups() when daemonizing.
3314 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3315 with consistent privilege compared to when running as a daemon.
3317 TF/03 Note in the spec that $authenticated_id is not set for local
3318 submissions from trusted users.
3320 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3321 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3323 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3324 by adding some example configuration directives to the default
3325 configuration file. A little bit of work is required to uncomment the
3326 directives and define how usernames and passwords are checked, but
3327 there is now a framework to start from.
3329 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3330 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3331 without this. I don't know how relevant this is to other LDAP libraries.
3333 PH/02 Add the verb name to the "unknown ACL verb" error.
3335 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3337 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3339 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3340 directory not expanded when it should be if an expanded home directory
3341 was set for the address (which is overridden by the transport).
3343 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3346 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3347 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3348 because it is too late at that time, and has no effect.
3350 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3351 security issue with \' (bugzilla #107). I could not use the
3352 PQescapeStringConn() function, because it needs a PGconn value as one of
3355 PH/08 When testing addresses using -bt, indicate those final addresses that
3356 are duplicates that would not cause an additional delivery. At least one
3357 person was confused, thinking that -bt output corresponded to deliveries.
3358 (Suppressing duplicates isn't a good idea as you lose the information
3359 about possibly different redirections that led to the duplicates.)
3361 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3362 systems where poll() doesn't work, in particular OS X.
3364 PH/10 Added more information to debugging output for retry time not reached.
3366 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3367 operations in malware.c.
3369 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3372 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3373 syslog_duplication set false, log lines that would normally be written
3374 both the the main log and to the reject log were not written to syslog at
3377 PH/14 In the default configuration, change the use of "message" in ACL warn
3378 statements to "add_header".
3380 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3381 not followed by a command (e.g. "seen endif").
3383 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3384 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3387 PH/17 Added extra conditions to the default value of delay_warning_condition
3391 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3392 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3393 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3396 The Auto-Submitted: and various List- headers are standardised, whereas I
3397 don't think Precedence: ever was.
3399 PH/18 Refactored debugging code in route_finduser() to show more information,
3400 in particular, the error code if getpwnam() issues one.
3402 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3403 This is apparently needed in addition to the PH/07 change above to avoid
3404 any possible encoding problems.
3406 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3407 but not after initializing Perl.
3409 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3410 output them only if debugging. By default they are written stderr,
3411 apparently, which is not desirable.
3413 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3416 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3419 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3421 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3422 authenticated or an ident call has been made. Suppress the default
3423 values for $authenticated_id and $authenticated_sender (but permit -oMai
3424 and -oMas) when testing with -bh.
3426 PH/24 Re-jigged the order of the tests in the default configuration so that the
3427 tests for valid domains and recipients precede the DNS black list and CSA
3428 tests, on the grounds that those ones are more expensive.
3430 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3431 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3432 This bug exists in every version of Exim that I still have, right back to
3435 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3436 However, an attempt to turn on case-sensitivity in a regex key by
3437 including (?-i) didn't work because the subject string was already
3438 lowercased, and the effects were non-intuitive. It turns out that a
3439 one-line patch can be used to allow (?-i) to work as expected.
3445 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3446 other effects) broke the use of negated acl sub-conditions.
3448 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3451 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3452 "Deny" causes Exim to reject the incoming connection with a 554 error.
3453 Unfortunately, if there is a major crisis, such as a disk failure,
3454 tcp-wrappers gives "deny", whereas what one would like would be some
3455 kind of temporary error. A kludge has been added to help with this.
3456 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3457 554 error is used if errno is still zero or contains ENOENT (which occurs
3458 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3461 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3463 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3464 errors. Otherwise a message that provokes a temporary error (when other
3465 messages do not) can cause a whole host to time out.
3467 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3468 addresses were routed directly to files or pipes from a redirect router.
3469 File deliveries just didn't batch; pipe deliveries might have suffered
3472 PH/06 A failure to get a lock for a hints database would erroneously always say
3473 "Failed to get write lock", even when it was really a read lock.
3475 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3476 of 0600. This has been changed to use the value of the lockfile_mode
3477 option (which defaults to 0600).
3479 PH/08 Applied small patch from the Sieve maintainer.
3481 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3482 folder from quota calculations, a direct delivery into this folder messed
3483 up the contents of the maildirsize file. This was because the regex was
3484 used only to exclude .Trash (or whatever) when the size of the mailbox
3485 was calculated. There was no check that a delivery was happening into an
3486 excluded directory. This bug has been fixed by ignoring all quota
3487 processing for deliveries into excluded directories.
3489 PH/10 Added the maildirfolder_create_regex option to appendfile.
3495 PH/01 The code for finding all the local interface addresses on a FreeBSD
3496 system running IPv6 was broken. This may well have applied to all BSD
3497 systems, as well as to others that have similar system calls. The broken
3498 code found IPv4 interfaces correctly, but gave incorrect values for the
3499 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3500 that it would not match correctly against @[] and not recognize the IPv6
3503 PH/02 The ipliteral router was not recognizing addresses of the form user@
3504 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3506 PH/03 Added disable_ipv6.
3508 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3509 decoded form, because it is most often used to construct To: headers
3510 lines in autoreplies, and the decoded form may well be syntactically
3511 invalid. However, $reply_address has leading white space removed, and all
3512 newlines turned into spaces so that the autoreply transport does not
3515 PH/05 If group was specified without a user on a router, and no group or user
3516 was specified on a transport, the group from the router was ignored.
3518 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3519 for visible compile-time settings that can be used to change these
3520 numbers, for those that want even more. Backwards compatibility with old
3521 spool files has been maintained. However, going back to a previous Exim
3522 release will lost any variables that are in spool files.
3524 PH/07 Two small changes when running in the test harness: increase delay when
3525 passing a TCP/IP connection to a new process, in case the original
3526 process has to generate a bounce, and remove special handling of
3527 127.0.0.2 (sic), which is no longer necessary.
3529 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3530 be the same on different OS.
3532 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3535 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3536 whether --show-vars was specified or not
3538 JJ/02 exipick: Added support for new ACL variable spool format introduced
3541 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3542 syntactically invalid From: or Reply-to: line, and a filter used this to
3543 generate an autoreply, and therefore failed to obtain an address for the
3544 autoreply, Exim could try to deliver to a non-existent relative file
3545 name, causing unrelated and misleading errors. What now happens is that
3546 it logs this as a hard delivery error, but does not attempt to create a
3549 PH/11 The exinext utility has a -C option for testing purposes, but although
3550 the given file was scanned by exinext itself; it wasn't being passed on
3551 when Exim was called.
3553 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3554 an end-of-file indication when reading a command response.
3556 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3557 compiled. In many other places in Exim, IPv6 addresses are always
3558 recognized, so I have changed this. It also means that IPv4 domain
3559 literals of the form [IPV4:n.n.n.n] are now always recognized.
3561 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3562 used if the router is not running as root, for example, when verifying at
3563 ACL time, or when using -bh. The debugging output from this situation was
3564 non-existent - all you got was a failure to exec. I have made two
3567 (a) Failures to set uid/gid, the current directory, or a process leader
3568 in a subprocess such as that created by queryprogram now generate
3569 suitable debugging output when -d is set.
3571 (b) The queryprogram router detects when it is not running as root,
3572 outputs suitable debugging information if -d is set, and then runs
3573 the subprocess without attempting to change uid/gid.
3575 PH/15 Minor change to Makefile for building test_host (undocumented testing
3578 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3579 additional section of a DNS packet that returns MX or SRV records.
3580 Instead, it always explicitly searches for A/AAAA records. This avoids
3581 major problems that occur when a DNS server includes only records of one
3582 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3583 fixed another bug: if SRV records were looked up and the corresponding
3584 address records were *not* found in the additional section, the port
3585 values from the SRV records were lost.
3587 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3588 using the correct key (the original address) when searching the retry
3589 rules in order to find which one to use for generating the retry hint.
3591 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3592 adding the default one. Similarly, if it contains a Reply-To: header, the
3593 errors_reply_to option, if set, is not used.
3595 PH/19 When calculating a retry time, Exim used to measure the "time since
3596 failure" by looking at the "first failed" field in the retry record. Now
3597 it does not use this if it is later than than the arrival time of the
3598 message. Instead it uses the arrival time. This makes for better
3599 behaviour in cases where some deliveries succeed, thus re-setting the
3600 "first failed" field. An example is a quota failure for a huge message
3601 when small messages continue to be delivered. Without this change, the
3602 "time since failure" will always be short, possible causing more frequent
3603 delivery attempts for the huge message than are intended.
3604 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3606 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3607 $1, $2, $3) because the numerical variables can be reset during some
3608 expansion items (e.g. "match"), thereby losing the authentication data.
3610 PH/21 Make -bV show the size of off_t variables so that the test suite can
3611 decide whether to run tests for quotas > 2G.
3613 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3614 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3615 filecount value is greater than 2G or if a quota value is greater than 2G
3616 on a system where the size of off_t is not greater than 4, a panic error
3619 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3620 never match. The debug and -bh output now contains an explicit error
3621 message indicating a malformed IPv4 address or mask.
3623 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3624 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3625 PH/23 above applies.
3627 PH/25 Do not write to syslog when running in the test harness. The only
3628 occasion when this arises is a failure to open the main or panic logs
3629 (for which there is an explicit test).
3631 PH/26 Added the /no_tell option to "control=freeze".
3633 PH/27 If a host name lookup failed very early in a connection, for example, if
3634 the IP address matched host_lookup and the reverse lookup yielded a name
3635 that did not have a forward lookup, an error message of the form "no IP
3636 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3637 could be logged. Now it outputs the IP address instead of "NULL".
3639 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3640 allows the sender and the authenticated sender to be set when
3641 submitting a message from within Exim. Since child_open_exim() is
3642 documented for local_scan(), the new function should be too.
3644 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3645 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3646 results in an empty string is now treated as unset.
3648 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3650 PH/31 Added sender_verify_fail logging option.
3652 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3653 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3654 tidied the source and removed it altogether.
3656 PH/33 When a queue run was abandoned because the load average was too high, a
3657 log line was always written; now it is written only if the queue_run log
3658 selector is set. In addition, the log line for abandonment now contains
3659 information about the queue run such as the pid. This is always present
3660 in "start" and "stop" lines but was omitted from the "abandon" line.
3662 PH/34 Omit spaces between a header name and the colon in the error message that
3663 is given when verify = headers_syntax fails (if there are lots of them,
3664 the message gets confusing).
3666 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3667 names, as there are now some PTR records that contain slashes. This check
3668 is only to protect against broken name servers that fall over on strange
3669 characters, so the fact that it applies to all lookups doesn't matter.
3671 PH/36 Now that the new test suite is complete, we can remove some of the
3672 special code in Exim that was needed for the old test suite. For example,
3673 sorting DNS records because real resolvers return them in an arbitrary
3674 order. The new test suite's fake resolver always returns records in the
3677 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3678 bounces) except when queue_only is set, to avoid logging races between
3679 the different processes.
3681 PH/38 Panic-die if .include specifies a non-absolute path.
3683 PH/39 A tweak to the "H" retry rule from its user.
3685 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3686 a label. They prevented compilation on older perls.
3688 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3689 a warning to be raised on newish perls.
3691 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3692 on queue. Changes to match documented behaviour of showing count of
3693 messages matching specified criteria.
3695 PH/40 Changed the default ident timeout from 30s to 5s.
3697 PH/41 Added support for the use of login_cap features, on those BSD systems
3698 that have them, for controlling the resources used by pipe deliveries.
3700 PH/42 The content-scanning code uses fopen() to create files in which to put
3701 message data. Previously it was not paying any attention to the mode of
3702 the files. Exim runs with umask(0) because the rest of the code creates
3703 files with open(), and sets the required mode explicitly. Thus, these
3704 files were ending up world-writeable. This was not a big issue, because,
3705 being within the spool directory, they were not world-accessible. I have
3706 created a function called modefopen, which takes an additional mode
3707 argument. It sets umask(777), creates the file, chmods it to the required
3708 mode, then resets the umask. All the relevant calls to fopen() in the
3709 content scanning code have been changed to use this function.
3711 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3712 to 24 hours. This avoids potential overflow problems when processing G
3713 and H retry rules. I suspect nobody ever tinkers with this value.
3715 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3717 PH/45 When the plaintext authenticator is running as a client, the server's
3718 challenges are checked to ensure they are valid base64 strings. By
3719 default, the authentication attempt is cancelled if an invalid string is
3720 received. Setting client_ignore_invalid_base64 true ignores these errors.
3721 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3722 they are received. Thus, the responses can be made to depend on the
3723 challenges. If an invalid string is ignored, an empty string is placed in
3726 PH/46 Messages that are created by the autoreply transport now contains a
3727 References: header, in accordance with RFCs 2822 and 3834.
3729 PH/47 Added authenticated_sender_force to the smtp transport.
3731 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3733 PH/49 Installed latest patch from the Sieve maintainer.
3735 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3736 was also set, the appendfile transport was unnecessarily scanning a
3737 directory of message files (e.g. for maildir delivery) to find the count
3738 of files (along with the size), even though it did not need this
3739 information. It now does the scan only if it needs to find either the
3740 size of the count of files.
3742 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3744 PH/52 Two bugs concerned with error handling when the smtp transport is
3747 (i) Exim was not creating retry information for temporary errors given
3748 for individual recipients after the DATA command when the smtp transport
3749 was used in LMTP mode. This meant that they could be retried too
3750 frequently, and not timed out correctly.
3752 (ii) Exim was setting the flag that allows error details to be returned
3753 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3754 recipients that were returned after the DATA command.
3756 PH/53 This is related to PH/52, but is more general: for any failing address,
3757 when detailed error information was permitted to be returned to the
3758 sender, but the error was temporary, then after the final timeout, only
3759 "retry timeout exceeded" was returned. Now it returns the full error as
3760 well as "retry timeout exceeded".
3762 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3763 do this, and (what is worse) MTAs that accept it.
3765 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3766 will now be deprecated.
3768 PH/56 New os.c-cygwin from the Cygwin maintainer.
3770 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3771 formats (previously only available in exim formats via -bpr, -bpru,
3772 and -bpra. Now also available in native and exiqgrep formats)
3774 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3775 with very large, slow to parse queues
3777 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3779 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3781 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3782 responses to authentication challenges, though it was showing the
3783 challenges; (ii) I've removed the CR characters from the debug output for
3786 PH/58 Allow for the insertion of a newline as well as a space when a string
3787 is turned into more than one encoded-word during RFC 2047 encoding. The
3788 Sieve code now uses this.
3790 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3791 data_4xx, lost_connection, tls_required.
3793 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3794 message was being sent as an SMTP response.
3796 PH/61 Add -l and -k options to exicyclog.
3798 PH/62 When verifying, if an address was redirected to one new address, so that
3799 verification continued, and the new address failed or deferred after
3800 having set something in $address_data, the value of $address_data was not
3801 passed back to the ACL. This was different to the case when no
3802 redirection occurred. The value is now passed back in both cases.
3804 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3805 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3806 use login_cap.h, so on its own it isn't the distinguishing feature. The
3807 new name refers directly to the setclassresources() function.
3809 PH/65 Added configuration files for NetBSD3.
3811 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3813 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3814 is preferred over IPv4.
3816 PH/68 The bounce_return_message and bounce_return_body options were not being
3817 honoured for bounces generated during the reception of non-SMTP messages.
3818 In particular, this applied to messages rejected by the ACL. This bug has
3819 been fixed. However, if bounce_return_message is true and bounce_return_
3820 body is false, the headers that are returned for a non-SMTP message
3821 include only those that have been read before the error was detected.
3822 (In the case of an ACL rejection, they have all been read.)
3824 PH/69 The HTML version of the specification is now built in a directory called
3825 spec_html instead of spec.html, because the latter looks like a path with
3826 a MIME-type, and this confuses some software.
3828 PH/70 Catch two compiler warnings in sieve.c.
3830 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3831 function verify_get_ident() calls ip_connect() to connect a socket, but
3832 if the "connect()" function timed out, ip_connect() used to close the
3833 socket. However, verify_get_ident() also closes the socket later, and in
3834 between Exim writes to the log, which may get opened at this point. When
3835 the socket was closed in ip_connect(), the log could get the same file
3836 descriptor number as the socket. This naturally causes chaos. The fix is
3837 not to close the socket in ip_connect(); the socket should be closed by
3838 the function that creates it. There was only one place in the code where
3839 this was missing, in the iplookup router, which I don't think anybody now
3840 uses, but I've fixed it anyway.
3842 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3843 well as to direct DNS lookups. Otherwise the handling of names in host
3844 lists is inconsistent and therefore confusing.
3850 PH/01 Two changes to the default runtime configuration:
3852 (1) Move the checks for relay_from_hosts and authenticated clients from
3853 after to before the (commented out) DNS black list checks.
3855 (2) Add control=submission to the relay_from_hosts and authenticated
3856 clients checks, on the grounds that messages accepted by these
3857 statements are most likely to be submissions.
3859 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3861 (1) Generate an error if the third argument for the ${prvs expansion is
3864 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3867 (3) Reset the variables that are obtained from the first argument of
3868 ${prvscheck and used in the second argument before leaving the code,
3869 because their memory is reclaimed, so using them afterwards may do
3872 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3873 one (it's much easier than Tom thought :-).
3875 (5) Because of (4), we can now allow for the use of $prvscheck_result
3876 inside the third argument.
3878 PH/03 For some reason, the default setting of PATH when running a command from
3879 a pipe transport was just "/usr/bin". I have changed it to
3882 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3883 anything to be listed in the output from -bV.
3885 PH/05 When a filter generated an autoreply, the entire To: header line was
3886 quoted in the delivery log line, like this:
3888 => >A.N.Other <ano@some.domain> <original@ddress> ...
3890 This has been changed so that it extracts the operative address. There
3891 may be more than one such address. If so, they are comma-separated, like
3894 => >ano@some.domain,ona@other.domain <original@ddress> ...
3896 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3897 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3898 not being looked up in the rDNS to get a host name, Exim was showing the
3899 IP address twice in Received: lines, even though the IP addresses were
3900 identical. For example:
3902 Received: from [1.2.3.4] (helo=[1.2.3.4])
3904 However, if the real host name was known, it was omitting the HELO data
3905 if it matched the actual IP address. This has been tidied up so that it
3906 doesn't show the same IP address twice.
3908 PH/07 When both +timestamp and +memory debugging was on, the value given by
3909 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3910 called by the debug printing, thereby overwriting the timestamp buffer.
3911 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3913 PH/08 When the original message was included in an autoreply transport, it
3914 always said "this is a copy of the message, including all the headers",
3915 even if body_only or headers_only was set. It now gives an appropriate
3918 PH/09 Applied a patch from the Sieve maintainer which:
3920 o fixes some comments
3921 o adds the (disabled) notify extension core
3922 o adds some debug output for the result of if/elsif tests
3923 o points to the current vacation draft in the documentation
3924 and documents the missing references header update
3928 o fixes a bug in processing the envelope test (when testing
3929 multiple envelope elements, the last element determined the
3932 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3933 Electronic Mail") by including:
3935 Auto-submitted: auto-generated
3937 in the messages that it generates (bounce messages and others, such as
3938 warnings). In the case of bounce messages for non-SMTP messages, there was
3939 also a typo: it was using "Auto_submitted" (underscore instead of
3940 hyphen). Since every message generated by Exim is necessarily in response
3941 to another message, thes have all been changed to:
3943 Auto-Submitted: auto-replied
3945 in accordance with these statements in the RFC:
3947 The auto-replied keyword:
3949 - SHOULD be used on messages sent in direct response to another
3950 message by an automatic process,
3952 - MUST NOT be used on manually-generated messages,
3954 - MAY be used on Delivery Status Notifications (DSNs) and Message
3955 Disposition Notifications (MDNs),
3957 - MUST NOT be used on messages generated by automatic or periodic
3958 processes, except for messages which are automatic responses to
3961 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3962 to the default Received: header definition.
3964 PH/12 Added log selector acl_warn_skipped (default on).
3966 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3967 variables because (a) they are in the wrong storage pool and (b) even if
3968 they were copied, it wouldn't work properly because of the caching.
3970 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3971 checking when decoding. Apparently there are clients that generate
3972 overlong encoded strings. Why am I not surprised?
3974 PH/15 If the first argument of "${if match_address" was not empty, but did not
3975 contain an "@" character, Exim crashed. Now it writes a panic log message
3976 and treats the condition as false.
3978 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3980 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3981 extension "envelope-auth". The code is finished and in agreement with
3982 other implementations, but there is no documentation so far and in fact,
3983 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3984 not changing the active code.
3986 Print executed "if" and "elsif" statements when debugging is used. This
3987 helps a great deal to understand what a filter does.
3989 Document more things not specified clearly in RFC3028. I had all this
3990 sorted out, when out of a sudden new issues came to my mind. Oops."
3992 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3995 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3996 canonical form (as documented). However, after a host name lookup from
3997 the IP address, check_host() was doing a simple string comparison with
3998 addresses acquired from the DNS when checking that the found name did
3999 have the original IP as one of its addresses. Since any found IPv6
4000 addresses are likely to be in abbreviated form, the comparison could
4001 fail. Luckily, there already exists a function for doing the comparison
4002 by converting both addresses to binary, so now that is used instead of
4003 the text comparison.
4005 PH/20 There was another similar case to PH/19, when a complete host name was
4006 given in a host list; looking up its IP address could give an abbreviated
4007 form, whereas the current host's name might or might not be abbreviated.
4008 The same fix has been applied.
4014 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4015 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4018 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4019 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4021 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4023 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4024 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4025 Also, for "Auto-Submitted", treat anything other than "no" as
4026 non-personal, in accordance with RFC 3834. (Previously it treated
4027 anything starting "auto-" as non-personal.)
4029 TF/01 The control=submission/name=... option had a problem with syntax
4030 errors if the name included a slash character. The /name= option
4031 now slurps the rest of the string, so it can include any characters
4032 but it must come last in the list of options (after /sender_retain
4035 PH/05 Some modifications to the interface to the fake nameserver for the new
4043 TK/01 Added the "success_on_redirect" address verification option. See
4044 NewStuff for rationale and an example.
4046 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4048 PH/02 Patch to exigrep to allow it to work on syslog lines.
4050 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4051 fread() to skip over the body file's header line, because in Cygwin the
4052 header line is locked and is inaccessible.
4054 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4055 co-exist for some time) to make it clear that it is the Exim ID that is
4056 referenced, not the Message-ID: header line.
4058 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4059 string_format() function, because snprintf() does not exist on all
4062 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4063 ${stat: expansion item.
4065 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4066 protocol synchronization error", to keep the pedants happy.
4068 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4069 well as for IRIX systems, when gcc is being used. See the host.c source
4072 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4074 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4077 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4078 transport and to the smtp transport in LMTP mode.
4080 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4082 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4083 run a filter in a subprocess. This could lead to confusion in subsequent
4084 lookups in the parent process. There should also be a search_tidyup() at
4085 the end of the subprocess.
4087 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4088 only if the host matched helo_try_verify_hosts, which caused the
4089 verification to occur when the EHLO/HELO command was issued. The ACL just
4090 tested the remembered result. Now, if a previous verification attempt has
4091 not happened, "verify = helo" does it there and then.
4093 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4095 TK/03 Fix log output including CR from clamd.
4097 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4098 exist provoked a memory error which could cause a segfault.
4100 PH/15 Installed PCRE 6.2
4102 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4104 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4105 of the problem. Specifically, suggested +O2 rather than +O1 for the
4108 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4110 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4111 record, the port was not correctly logged when the outgoing_port log
4112 selector was set (it logged the transort's default port).
4114 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4115 fallback_hosts, and "hosts" in the smtp transport.
4117 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4118 host errors such as "Connection refused".
4120 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4121 authentication with radiusclient 0.4.9:
4123 - Error returned from rc_read_config was caught wrongly
4124 - Username/password not passed on to radius server due to wrong length.
4126 The presumption is that some radiusclient API changes for 4.51/PH/17
4127 were not taken care of correctly. The code is still untested by me (my
4128 Linux distribution still has 0.3.2 of radiusclient), but it was
4129 contributed by a Radius user.
4131 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4132 expanding the "port" option of the smtp transport.
4134 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4135 while reading a MIME header. Thanks to Tom Hughes for a patch.
4137 PH/24 Include config.h inside local_scan.h so that configuration settings are
4140 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4141 that in an ACL for RCPT (for example), you can examine exactly what was
4144 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4145 commands, but it was not correctly comparing the address with the actual
4146 client host address. Thus, it would show the EHLO address in Received:
4147 header lines when this was not necessary.
4149 PH/27 Added the % operator to ${eval:}.
4151 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4152 it should be ignoring failures (because with -C, for example, it has lost
4153 privilege). It wasn't ignoring creation failures other than "already
4156 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4159 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4160 because an input line was too long, either on its own, or by virtue of
4161 too many continuations, the temporary file was not being removed, and the
4162 return code was incorrect.
4164 PH/31 Missing "BOOL" in function definition in filtertest.c.
4166 PH/32 Applied Sieve patches from the maintainer.
4168 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4170 PH/33 Added "verify = not_blind".
4172 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4173 Local/Makefile (with some defaults set). These are used in built scripts
4174 such as exicyclog, but they have never been used in the exim_install
4175 script (though there are many overriding facilities there). I have
4176 arranged that the exim_install script now takes note of these two
4179 PH/35 Installed configuration files for Dragonfly.
4181 PH/36 When a locally submitted message by a trusted user did not contain a
4182 From: header, and the sender address was obtained from -f or from an SMTP
4183 MAIL command, and the trusted user did not use -F to supply a sender
4184 name, $originator_name was incorrectly used when constructing a From:
4185 header. Furthermore, $originator_name was used for submission mode
4186 messages from external hosts without From: headers in a similar way,
4187 which is clearly wrong.
4189 PH/37 Added control=suppress_local_fixups.
4191 PH/38 When log_selector = +received_sender was set, and the addition of the
4192 sender made the log line's construction buffer exactly full, or one byte
4193 less than full, an overflow happened when the terminating "\n" was
4196 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4197 when the result of a list match is failure because a DNS lookup failed.
4199 PH/40 RM_COMMAND is now used in the building process.
4201 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4202 the "build-* directories that it finds.
4204 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4205 address in a domain literal was a prefix of an interface address.
4207 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4208 when verifying a sender address, unless rewrite_headers is false.
4210 PH/44 Wrote a long comment about why errors_to addresses are verified as
4211 recipients, not senders.
4213 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4214 the ratelimit ACL was added.
4216 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4218 PH/46 Added extra information about PostgreSQL errors to the error string.
4220 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4221 avoiding the need to install special zones in a real server. This is
4222 backwards compatible; if it can't find the fake resolver, it drops back.
4223 Thus, both old and new test suites can be run.
4225 TF/02 Added util/ratelimit.pl
4227 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4228 clock is set back in time.
4230 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4231 Candler <B.Candler@pobox.com>.
4233 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4234 OK for addresses that are the result of redirections.
4236 PH/48 A number of further additions for the benefit of the new test suite,
4237 including a fake gethostbyname() that interfaces to the fake DNS resolver
4240 TF/06 The fix for widen_domains has also been applied to qualify_single and
4241 search_parents which are the other dnslookup options that can cause
4244 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4247 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4249 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4250 service" if it encountered an MX record with an empty target hostname.
4251 The message is now "an MX or SRV record indicated no SMTP service".
4253 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4254 if the DNS of the sending site is misconfigured. This is quite a
4255 common situation. This change restores the behaviour of treating a
4256 helo verification defer as a failure.
4258 PH/51 If self=fail was set on a router, the bounce message did not include the
4259 actual error message.
4265 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4267 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4268 command itself ended in error, the underlying message about the transport
4269 filter timeout was being overwritten with the pipe command error. Now the
4270 underlying error message should be appended to the second error message.
4272 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4274 PH/02 Reduce the amount of output that "make" produces by default. Full output
4275 can still be requested.
4277 PH/03 The warning log line about a condition test deferring for a "warn" verb
4278 was being output only once per connection, rather than after each
4279 occurrence (because it was using the same function as for successful
4280 "warn" verbs). This seems wrong, so I have changed it.
4282 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4283 it should not have, which might have caused a crash in the right
4284 circumstances, but probably never did.
4286 PH/04 Installed a modified version of Tony Finch's patch to make submission
4287 mode fix the return path as well as the Sender: header line, and to
4288 add a /name= option so that you can make the user's friendly name appear
4291 TF/03 Added the control = fakedefer ACL modifier.
4293 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4294 Mark Lowes for thorough testing.
4296 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4298 TK/03 Merged latest SRS patch from Miles Wilton.
4300 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4301 with the definition in sysexits.h (which is #included earlier).
4302 Fortunately, Exim does not actually use EX_OK. The code used to try to
4303 preserve the sysexits.h value, by assuming that macro definitions were
4304 scanned for macro replacements. I have been disabused of this notion,
4305 so now the code just undefines EX_OK before #including unistd.h.
4307 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4308 in the smtp transport. When a block could not be written in a single
4309 write() function, the timeout was being re-applied to each part-write.
4310 This seems wrong - if the receiver was accepting one byte at a time it
4311 would take for ever. The timeout is now adjusted when this happens. It
4312 doesn't have to be particularly precise.
4314 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4315 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4317 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4318 without a domain if the check to <postmaster@domain> fails.
4320 SC/01 Eximstats: added -xls and the ability to specify output files
4321 (patch written by Frank Heydlauf).
4323 SC/02 Eximstats: use FileHandles for outputting results.
4325 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4327 SC/04 Eximstats: fixed display of large numbers with -nvr option
4329 SC/05 Eximstats: fixed merging of reports with empty tables.
4331 SC/06 Eximstats: added the -include_original_destination flag
4333 SC/07 Eximstats: removed tabs and trailing whitespace.
4335 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4337 TK/06 MBOX spool code: Add real "From " MBOX separator line
4338 so the .eml file is really in mbox format (even though
4339 most programs do not really care). Patch from Alex Miller.
4341 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4342 The latter is generated from $received_to and is only set if the
4343 message has one envelope recipient. SA can use these headers,
4344 obviously out-of-the-box. Patch from Alex Miller.
4346 PH/08 The ${def test on a variable was returning false if the variable's
4347 value was "0", contrary to what the specification has always said!
4348 The result should be true unless the variable is empty.
4350 PH/09 The syntax error of a character other than { following "${if
4351 def:variable_name" (after optional whitespace) was not being diagnosed.
4352 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4353 accidental colon was present, for example, could give incorrect results.
4355 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4356 result is used (not including appendfile, where other changes are about
4359 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4360 This involved changing a lot of size variables from int to off_t. It
4361 should work with maildirs and everything.
4363 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4364 spamd dying while we are connected to it.
4366 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4369 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4370 function for BDB 4.3.
4372 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4374 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4375 the sources for PCRE have been re-arranged and more files are now
4378 PH/15 The code I had for printing potentially long long variables in PH/11
4379 above was not the best (it lost precision). The length of off_t variables
4380 is now inspected at build time, and an appropriate printing format (%ld
4381 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4382 to be "long long int" or "long int". This is needed for the internal
4383 formatting function string_vformat().
4385 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4386 the configuration file to be ":syslog", then the script "guesses" where
4387 the logs files are, rather than using the compiled in default. In our
4388 case the guess is not the same as the compiled default, so the script
4389 suddenly stopped working when I started to use syslog. The patch checks
4390 to see if log_file_path is "". If so, it attempts to read it from exim
4391 with no configuration file to get the compiled in version, before it
4392 falls back to the previous guessing code."
4394 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4395 implementing BATV in an Exim configuration. See NewStuff for the gory
4398 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4399 Makefile that are specific to HP-UX.
4401 PH/18 If the "use_postmaster" option was set for a recipient callout together
4402 with the "random" option, the postmaster address was used as the MAIL
4403 FROM address for the random test, but not for the subsequent recipient
4404 test. It is now used for both.
4406 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4407 patch removes a few documentation additions to RFC 3028, because the
4408 latest draft now contains them. It adds the new en;ascii-case comparator
4409 and a new error check for 8bit text in MIME parts. Comparator and
4410 require names are now matched exactly. I enabled the subaddress
4411 extension, but it is not well tested yet (read: it works for me)."
4413 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4414 rework some of the code of TK/09 above to avoid the hardwired use of
4415 "%lld" and "long long". Replaced the call to snprintf() with a call to
4418 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4419 records point to non-existent hosts", "retry timeout exceeded", and
4420 "retry time not reached for any host after a long failure period".
4422 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4423 experimental DomainKeys support:
4425 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4426 (2) On an error such as an illegally used "control", the wrong name for
4427 the control was given.
4429 These problems did NOT occur unless DomainKeys support was compiled.
4431 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4433 PH/24 Added ${if match_ip condition.
4435 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4436 databases so that it will be absolutely obvious if a crash occurs in the
4437 DB library. This is a regular occurrence (often caused by mis-matched
4440 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4441 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4442 picked up on a user's system that detects such things. There doesn't seem
4443 to be a gcc warning option for this - only an attribute that has to be
4444 put on the function's prototype. It seems that in Fedora Core 4 they have
4445 set this on a number of new functions. No doubt there will be more in due
4448 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4449 specify a transport. However, if an address that was verified by such a
4450 router was the subject of a callout, Exim crashed because it tried to
4451 read the rcpt_include_affixes from the non-existent transport. Now it
4452 just assumes that the setting of that option is false. This bug was
4453 introduced by 4.51/PH/31.
4455 PH/28 Changed -d+all to exclude +memory, because that information is very
4456 rarely of interest, but it makes the output a lot bigger. People tend to
4457 do -d+all out of habit.
4459 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4460 code in os-type was giving problems when libc.so lives in lib64, like on
4463 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4464 aren't the modern standard, and it seems that some systems' include files
4465 don't always have them. Exim was already checking for some of the newer
4466 ones like T_AAAA, and defining it itself. I've added checks for all the
4467 record types that Exim uses.
4469 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4470 not automatically generating a new one, as it is supposed to. This
4471 prevented TLS from working. If the file did exist, but contained invalid
4472 data, a new version was generated, as expected. It was only the case of a
4473 non-existent file that was broken.
4475 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4476 with a change in libdomainkeys > 0.64.
4478 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4479 from DNS. If the selector record carries the flag, it now has
4480 precedence over the domain-wide flag.
4482 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4484 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4485 the use of a port name that isn't defined in /etc/services) occurred, the
4486 message was deferred as in a normal delivery, and thus remained on the
4487 spool, instead of being failed because of the mua_wrapper setting. This
4488 is now fixed, and I tidied up some of the mua_wrapper messages at the
4491 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4492 the messages in a hash of arrays rather than using individual hashes.
4493 This is a bit cleaner and results in dramatic memory savings, albeit
4494 at a slight CPU cost.
4496 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4497 as requested by Marc Sherman.
4499 SC/10 Eximstats: added histograms for user specified patterns as requested
4502 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4504 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4505 fopen() in the content-scanning modules that did not already have it.
4511 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4512 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4514 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4516 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4518 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4519 to test Sieve filters that use "vacation".
4521 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4522 that changes the way the GnuTLS parameters are stored in the cache file.
4523 The new format can be generated externally. For backward compatibility,
4524 if the data in the cache doesn't make sense, Exim assumes it has read an
4525 old-format file, and it generates new data and writes a new file. This
4526 means that you can't go back to an older release without removing the
4529 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4530 work if there are any delivery delays because "one_time" forces the
4531 parent to be marked "delivered", so its unseen clone is never tried
4532 again. For this reason, Exim now forbids the simultaneous setting of
4535 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4536 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4537 entry if you want to know the details. The fix, however, neglected to
4538 consider the case when local delivery batching is involved. The test for
4539 "previously delivered" was not happening when checking to see if an
4540 address could be batched with a previous (undelivered) one; under
4541 certain circumstances this could lead to multiple deliveries to the same
4544 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4545 in its include files, and this causes problems building Exim.
4547 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4548 header_syntax) but Exim was just ignoring anything given after a slash.
4549 In particular, this caused confusion with an attempt to use "verify =
4550 reverse_host_lookup/defer_ok". An error is now given when options are
4551 supplied for verify items that do not have them. (Maybe reverse_host_
4552 lookup should have a defer_ok option, but that's a different point.)
4554 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4555 defined by RFC 821) to 2048, because there were problems with some AUTH
4556 commands, and RFC 1869 says the size should be increased for extended
4557 SMTP commands that take arguments.
4559 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4562 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4563 "unknown" error; now it says that the functionality isn't in the binary.
4565 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4566 an address' error message when a string expansion fails (syntax or
4567 whatever). Otherwise the password may appear in the log. Following change
4568 PH/42 below, there is no longer a chance of it appearing in a bounce
4571 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4573 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4574 of its addresses was ever tried. (Bugzilla bug #2.)
4576 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4577 the result incorrectly in the debug output. (It correctly added a newline
4578 to what was transported.)
4580 TF/01 Added $received_time.
4582 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4583 commented out examples of how to interface to a virus scanner and to
4584 SpamAssassin. Also added commented examples of av_scanner and
4585 spamd_address settings.
4587 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4588 and controls are allowed in which ACLs. There were a couple of minor
4589 errors. Some of the entries in the conditions table (which is a table of
4590 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4591 negation of where the condition IS allowed.
4593 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4595 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4596 header file does not have a version number, so I've had to invent a new
4597 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4598 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4599 radiusclient), but it was contributed by a Radius user.
4601 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4602 files or directories, for OpenSSL.
4604 PH/19 When an Exim process that is running as root has to create an Exim log
4605 file, it does so in a subprocess that runs as exim:exim so as to get the
4606 ownership right at creation (otherwise, other Exim processes might see
4607 the file with the wrong ownership). There was no test for failure of this
4608 fork() call, which would lead to the process getting stuck as it waited
4609 for a non-existent subprocess. Forks do occasionally fail when resources
4610 run out. I reviewed all the other calls to fork(); they all seem to check
4613 PH/20 When checking for unexpected SMTP input at connect time (before writing
4614 the banner), Exim was not dealing correctly with a non-positive return
4615 from the read() function. If the client had disconnected by this time,
4616 the result was a log entry for a synchronization error with an empty
4617 string after "input=" when read() returned zero. If read() returned -1
4618 (an event I could not check), uninitialized data bytes were printed.
4619 There were reports of junk text (parts of files, etc) appearing after
4622 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4624 PH/22 Added support for macro redefinition, and (re)definition in between
4625 driver and ACL definitions.
4627 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4628 forgetting to use the resulting value; it was using the unexpanded value.
4630 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4631 hadn't been configured. The fix is from Juergen Kreileder, who
4632 understands it better than I do:
4634 "Here's what I see happening with three configured cyrus_sasl
4635 authenticators configured (plain, login, cram-md5):
4637 On startup auth_cyrus_sasl_init() gets called for each of these.
4638 This means three calls to sasl_listmech() without a specified mech_list.
4639 => SASL tests which mechs of all available mechs actually work
4640 => three warnings about OTP not working
4641 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4643 With the patch, sasl_listmech() also gets called three times. But now
4644 SASL's mech_list option is set to the server_mech specified in the the
4645 authenticator. Or in other words, the answer from sasl_listmech()
4646 gets limited to just the mech you're testing for (which is different
4648 => the return list contains just 'plain' or 'login', 'cram-md5' or
4649 nothing depending on the value of ob->server_mech.
4651 I've just tested the patch: Authentication still works fine,
4652 unavailable mechs specified in the exim configuration are still
4653 caught, and the auth.log warnings about OTP are gone."
4655 PH/25 When debugging is enabled, the contents of the command line are added
4656 to the debugging output, even when log_selector=+arguments is not
4659 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4660 answer is "GNU", and only if the return is "GNU/something" is the answer
4663 PH/27 $acl_verify_message is now set immediately after the failure of a
4664 verification in an ACL, and so is available in subsequent modifiers. In
4665 particular, the message can be preserved by coding like this:
4667 warn !verify = sender
4668 set acl_m0 = $acl_verify_message
4670 Previously, $acl_verify_message was set only while expanding "message"
4671 and "log_message" when a very denied access.
4673 PH/28 Modified OS/os.c-Linux with
4675 -#ifndef OS_LOAD_AVERAGE
4676 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4678 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4679 nomenclature these days.)
4681 PH/29 Installed patch from the Sieve maintainer that adds the options
4682 sieve_useraddress and sieve_subaddress to the redirect router.
4684 PH/30 In these circumstances:
4685 . Two addresses routed to the same list of hosts;
4686 . First host does not offer TLS;
4687 . First host accepts first address;
4688 . First host gives temporary error to second address;
4689 . Second host offers TLS and a TLS session is established;
4690 . Second host accepts second address.
4691 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4692 and peerdn, if requested) that were in fact used only for the second
4695 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4696 attention to any local part prefix or suffix that was matched by the
4697 router that accepted the address. It now behaves in the same way as it
4698 does for delivery: the affixes are removed from the local part unless
4699 rcpt_include_affixes is set on the transport.
4701 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4702 timeout during the DATA phase of an incoming message.
4704 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4705 applied a patch sanctioned by the Sieve maintainer.
4707 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4708 the uid or gid is negative. A case of a negative gid caused this to be
4709 noticed. The fix allows for either to be negative.
4711 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4712 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4715 PH/36 The change PH/12 above was broken. Fixed it.
4717 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4718 the grounds that routing the same address twice would always produce the
4719 same answer. This might have been true once, but it is certainly no
4720 longer true now. Routing a child address may depend on the previous
4721 routing that produced that child. Some complicated redirection strategies
4722 went wrong when messages had multiple recipients, and made Exim's
4723 behaviour dependent on the order in which the addresses were given.
4725 I have moved the duplicate checking until after the routing is complete.
4726 Exim scans the addresses that are assigned to local and remote
4727 transports, and removes any duplicates. This means that more work will be
4728 done, as duplicates will always all be routed, but duplicates are
4729 presumably rare, so I don't expect this is of any significance.
4731 For deliveries to pipes, files, and autoreplies, the duplicate checking
4732 still happens during the routing process, since they are not going to be
4735 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4736 It corrects a timeout issue with spamd. This is Ian's comment: "The
4737 background is that sometimes spamd either never reads data from a
4738 connection it has accepted, or it never writes response data. The exiscan
4739 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4740 blindly assumes that writes won't block so it may never time out."
4742 PH/39 Allow G after quota size as well as K and M.
4744 PH/40 The value set for $authenticated_id in an authenticator may not contain
4745 binary zeroes or newlines because the value is written to log lines and
4746 to spool files. There was no check on this. Now the value is run through
4747 the string_printing() function so that such characters are converted to
4748 printable escape sequences.
4750 PH/41 $message_linecount is a new variable that contains the total number of
4751 lines in the message. Compare $body_linecount, which is the count for the
4754 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4755 bounce and delay warning messages, except in certain special cases, which
4758 (a) An SMTP error message from a remote host;
4759 (b) A message specified in a :fail: redirection;
4760 (c) A message specified in a "fail" command in a system filter;
4761 (d) A message specified in a FAIL return from the queryprogram router;
4762 (e) A message specified by the cannot_route_message router option.
4764 In these cases only, Exim does include the error details in bounce and
4765 warning messages. There are also a few cases where bland messages such
4766 as "unrouteable address" or "local delivery error" are given.
4768 PH/43 $value is now also set for the "else" part of a ${run expansion.
4770 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4771 being worked on, but at least Exim now implements the latest version to
4774 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4775 process to complete was treated as a delivery failure, a timeout while
4776 writing the message to the pipe was logged, but erroneously treated as a
4777 successful delivery. Such timeouts include transport filter timeouts. For
4778 consistency with the overall process timeout, these timeouts are now
4779 treated as errors, giving rise to delivery failures by default. However,
4780 there is now a new Boolean option for the pipe transport called
4781 timeout_defer, which, if set TRUE, converts the failures into defers for
4782 both kinds of timeout. A transport filter timeout is now identified in
4785 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4786 systems where "make" and "gmake" are different, calling "gmake" at top
4787 level broke things. I've arranged for the value of $(MAKE) to be passed
4788 from the Makefile to this script so that it can call the same version of
4792 A note about Exim versions 4.44 and 4.50
4793 ----------------------------------------
4795 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4796 changes of various kinds. As a consequence, a big documentation update was
4797 needed. This delayed the release for rather longer than seemed good, especially
4798 in the light of a couple of (minor) security issues. Therefore, the changes
4799 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4800 release. So 4.44 and 4.50 are in effect two different branches that both start
4803 I have left the 4.50 change log unchanged; it contains all the changes since
4804 4.43. The change log for 4.44 is below; many of its items are identical to
4805 those for 4.50. This seems to be the most sensible way to preserve the
4806 historical information.
4812 1. Minor wording change to the doc/README.SIEVE file.
4814 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4815 computation of the current number of files was incorrect.
4817 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4818 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4821 4. Give more explanation in the error message when the command for a transport
4822 filter fails to execute.
4824 5. There are several places where Exim runs a non-Exim command in a
4825 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4826 was being done only for the command run by the queryprogram router. It is
4827 now done for all such subprocesses. The other cases are: ${run, transport
4828 filters, and the commands run by the lmtp and pipe transports.
4830 6. Added CONFIGURE_GROUP build-time option.
4832 7. Some older OS have a limit of 256 on the maximum number of file
4833 descriptors. Exim was using setrlimit() to set 1000 as a large value
4834 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4835 systems. I've change it so that if it can't get 1000, it tries for 256.
4837 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4838 was an oversight, and furthermore, ever since the addition of extra
4839 controls (e.g. 4.43/32), the checks on when to allow different forms of
4840 "control" were broken. There should now be diagnostics for all cases when a
4841 control that does not make sense is encountered.
4843 9. Added the /retain_sender option to "control=submission".
4845 10. $recipients is now available in the predata ACL (oversight).
4847 11. Tidy the search cache before the fork to do a delivery from a message
4848 received from the command line. Otherwise the child will trigger a lookup
4849 failure and thereby defer the delivery if it tries to use (for example) a
4850 cached ldap connection that the parent has called unbind on.
4852 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4853 of $address_data from the recipient verification was clobbered by the
4854 sender verification.
4856 13. The value of address_data from a sender verification is now available in
4857 $sender_address_data in subsequent conditions in the ACL statement.
4859 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4861 15. Added a new option "connect=<time>" to callout options, to set a different
4864 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4865 was its contents. (It was OK if the option was not defined at all.)
4867 17. A "Completed" log line is now written for messages that are removed from
4868 the spool by the -Mrm option.
4870 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4871 information about exactly what failed.
4873 19. Added -dd to debug only the daemon process.
4875 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4876 handles timeouts, both on the server side and network timeouts. Renamed the
4877 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4879 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4880 It is now set to "smtps".
4882 22. $host_address is now set to the target address during the checking of
4883 ignore_target_hosts.
4885 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4886 being passed; this would have caused $sender_host_name to have been used if
4887 matching the list had actually called for a host name (not very likely,
4888 since this list is usually IP addresses). A host name is now passed as
4891 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4892 code that specifies a non-restarting handler (typically sigaction() in
4893 modern systems) in an attempt to fix a rare and obscure crash bug.
4895 25. Narrowed the window for a race in the daemon that could cause it to ignore
4896 SIGCHLD signals. This is not a major problem, because they are used only to
4897 wake it up if nothing else does.
4899 26. A malformed maildirsize file could cause Exim to calculate negative values
4900 for the mailbox size or file count. Odd effects could occur as a result.
4901 The maildirsize information is now recalculated if the size or filecount
4904 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4905 support for a long time. Removed HAVE_SYS_VFS_H.
4907 28. Installed the latest version of exipick from John Jetmore.
4909 29. In an address list, if the pattern was not a regular expression, an empty
4910 subject address (from a bounce message) matched only if the pattern was an
4911 empty string. Non-empty patterns were not even tested. This was the wrong
4912 because it is perfectly reasonable to use an empty address as part of a
4913 database query. An empty address is now tested by patterns that are
4914 lookups. However, all the other forms of pattern expect the subject to
4915 contain a local part and a domain, and therefore, for them, an empty
4916 address still always fails if the pattern is not itself empty.
4918 30. Exim went into a mad DNS loop when attempting to do a callout where the
4919 host was specified on an smtp transport, and looking it up yielded more
4920 than one IP address.
4922 31. Re-factored the code for checking spool and log partition space into a
4923 function that finds that data and another that does the check. The former
4924 is then used to implement four new variables: $spool_space, $log_space,
4925 $spool_inodes, and $log_inodes.
4927 32. The RFC2047 encoding function was originally intended for short strings
4928 such as real names; it was not keeping to the 75-character limit for
4929 encoded words that the RFC imposes. It now respects the limit, and
4930 generates multiple encoded words if necessary. To be on the safe side, I
4931 have increased the buffer size for the ${rfc2047: expansion operator from
4934 33. It is now permitted to omit both strings after an "if" condition; if the
4935 condition is true, the result is "true". As before, when the second string
4936 is omitted, a false condition yields an empty string. This makes it less
4937 cumbersome to write custom ACL and router conditions.
4939 34. Failure to deliver a bounce message always caused it to be frozen, even if
4940 there was an errors_to setting on the router. The errors_to setting is now
4943 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4944 canonical form (fully expanded) before being placed in
4945 $sender_host_address.
4947 36. The table in the code that translates DNS record types into text (T_A to
4948 "A" for instance) was missing entries for NS and CNAME. It is just possible
4949 that this could have caused confusion if both these types were looked up
4950 for the same domain, because the text type is used as part of Exim's
4951 per-process caching. But the chance of anyone hitting this buglet seems
4954 37. The dnsdb lookup has been extended in a number of ways.
4956 (1) There is a new type, "zns", which walks up the domain tree until it
4957 finds some nameserver records. It should be used with care.
4959 (2) There is a new type, "mxh", which is like "mx" except that it returns
4960 just the host names, not the priorities.
4962 (3) It is now possible to give a list of domains (or IP addresses) to be
4963 looked up. The behaviour when one of the lookups defers can be
4964 controlled by a keyword.
4966 (4) It is now possible to specify the separator character for use when
4967 multiple records are returned.
4969 38. The dnslists ACL condition has been extended: it is now possible to supply
4970 a list of IP addresses and/or domains to be looked up in a particular DNS
4973 39. Added log_selector=+queue_time_overall.
4975 40. When running the queue in the test harness, wait just a tad after forking a
4976 delivery process, to get repeatability of debugging output.
4978 41. Include certificate and key file names in error message when GnuTLS fails
4979 to set them up, because the GnuTLS error message doesn't include the name
4980 of the failing file when there is a problem reading it.
4982 42. Allow both -bf and -bF in the same test run.
4984 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4986 44. The "Exiscan patch" is now merged into the mainline Exim source.
4988 45. Sometimes the final signoff response after QUIT could fail to get
4989 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4990 < 0 before doing a fflush(). This bug looks as though it goes back to the
4991 introduction of TLS in release 3.20, but "sometimes" must have been rare
4992 because the tests only now provoked it.
4994 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4995 (this can affect the format of dates).
4997 47. exim_tidydb, when checking for the continued existence of a message for
4998 which it has found a message-specific retry record, was not finding
4999 messages that were in split spool directories. Consequently, it was
5000 deleting retry records that should have stayed in existence.
5002 48. Steve fixed some bugs in eximstats.
5004 49. The SPA authentication driver was not abandoning authentication and moving
5005 on to the next authenticator when an expansion was forced to fail,
5006 contradicting the general specification for all authenticators. Instead it
5007 was generating a temporary error. It now behaves as specified.
5009 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5010 (the order specifies the preference for clients). The order is now AES256,
5011 AES128, 3DES, ARCFOUR128.
5013 51. Small patch to Sieve code - explicitly set From: when generating an
5016 52. Exim crashed if a remote delivery caused a very long error message to be
5017 recorded - for instance if somebody sent an entire SpamAssassin report back
5018 as a large number of 550 error lines. This bug was coincidentally fixed by
5019 increasing the size of one of Exim's internal buffers (big_buffer) that
5020 happened as part of the Exiscan merge. However, to be on the safe side, I
5021 have made the code more robust (and fixed the comments that describe what
5024 53. Now that there can be additional text after "Completed" in log lines (if
5025 the queue_time_overall log selector is set), a one-byte patch to exigrep
5026 was needed to allow it to recognize "Completed" as not the last thing in
5029 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5030 patch that reportedly fixes this has been added. I am not expert enough to
5031 create a test for it. This is what the patch creator wrote:
5033 "I found a little strange behaviour of ldap code when working with
5034 Windows 2003 AD Domain, where users was placed in more than one
5035 Organization Units. When I tried to give exim partial DN, the exit code
5036 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5037 But simultaneously result of request was absolutely normal ldap result,
5038 so I produce this patch..."
5040 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5041 REFERENCE, so I have modified the code to exclude the patch when that macro
5044 55. Some experimental protocols are using DNS PTR records for new purposes. The
5045 keys for these records are domain names, not reversed IP addresses. The
5046 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5047 leaves it alone. Component reversal etc. now happens only for IP addresses.
5050 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5052 57. Double the size of the debug message buffer (to 2048) so that more of very
5053 long debug lines gets shown.
5055 58. The exicyclog utility now does better if the number of log files to keep
5056 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5058 59. Two changes related to the smtp_active_hostname option:
5060 (1) $smtp_active_hostname is now available as a variable.
5061 (2) The default for smtp_banner uses $smtp_active_hostname instead
5062 of $primary_hostname.
5064 60. The host_aton() function is supposed to be passed a string that is known
5065 to be a valid IP address. However, in the case of IPv6 addresses, it was
5066 not checking this. This is a hostage to fortune. Exim now panics and dies
5067 if the condition is not met. A case was found where this could be provoked
5068 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5069 components; fortuitously, this particular loophole had already been fixed
5070 by change 4.50/55 above.
5072 If there are any other similar loopholes, the new check in host_aton()
5073 itself should stop them being exploited. The report I received stated that
5074 data on the command line could provoke the exploit when Exim was running as
5075 exim, but did not say which command line option was involved. All I could
5076 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5077 running as the user.
5080 61. There was a buffer overflow vulnerability in the SPA authentication code
5081 (which came originally from the Samba project). I have added a test to the
5082 spa_base64_to_bits() function which I hope fixes it.
5085 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5086 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5088 63. The daemon start-up calls getloadavg() while still root for those OS that
5089 need the first call to be done as root, but it missed one case: when
5090 deliver_queue_load_max is set with deliver_drop_privilege. This is
5091 necessary for the benefit of the queue runner, because there is no re-exec
5092 when deliver_drop_privilege is set.
5094 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5095 This has been fixed.
5097 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5098 was in use, was not putting the data itself into the right store pool;
5099 consequently, it could be overwritten for a subsequent message in the same
5100 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5103 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5105 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5106 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5107 the function were treating the return as a boolean value, which happened to
5108 work because 0=false and not-0=true, but is not correct code.
5110 68. The host_aton() function was not handling scoped IPv6 addresses (those
5111 with, for example, "%eth0" on the end) correctly.
5113 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5114 negated items (that is, ~something) in unsigned ints. Some compilers
5115 apparently mutter when there is no cast.
5117 70. If an address verification called from an ACL failed, and did not produce a
5118 user-specific message (i.e. there was only a "system" message), nothing was
5119 put in $acl_verify_message. In this situation, it now puts the system
5122 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5123 session; change 4.31/43 added the unwanted input to the log line - except
5124 that it did not do this in the start of session case. It now does.
5126 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5127 This is wrong and can cause the other end to generate a synchronization
5128 error if it is another Exim or anything else that does the synchronization
5129 check. A QUIT command is no longer sent after a timeout.
5131 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5132 during host lookups.
5134 74. The defer_ok option of callout verification was not working if it was used
5135 when verifying addresses in header lines, that is, for this case:
5137 verify = header_sender/callout=defer_ok
5139 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5140 those file descriptors could be used for SMTP connections. If anything
5141 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5142 could be sent to the SMTP client, causing chaos. The daemon now opens
5143 stdin, stdout, and stderr to /dev/null when it puts itself into the
5146 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5147 log by default. The user can override this with suitable Perl magic.
5149 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5150 the log message when discard triggers, was not working for the DATA ACL or
5151 for the non-SMTP ACL.
5153 78. Error message wording change in sieve.c.
5155 79. If smtp_accept_max_per_host was set, the number of connections could be
5156 restricted to fewer than expected, because the daemon was trying to set up
5157 a new connection before checking whether the processes handling previous
5158 connections had finished. The check for completed processes is now done
5159 earlier. On busy systems, this bug wouldn't be noticed because something
5160 else would have woken the daemon, and it would have reaped the completed
5163 80. If a message was submitted locally by a user whose login name contained one
5164 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5165 It caused a spool format error. I have fixed the spool reading code. A
5166 related problem was that the "from" clause in the Received: line became
5167 illegal because of the space(s). It is now covered by ${quote_local_part.
5169 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5172 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5174 83. Patch from Sieve maintainer to fix unterminated string problem in
5175 "vacation" handling.
5177 84. Some minor changes to the Linux configuration files to help with other
5178 OS variants using glibc.
5180 85. One more patch for Sieve to update vacation handling to latest spec.
5183 ----------------------------------------------------
5184 See the note above about the 4.44 and 4.50 releases.
5185 ----------------------------------------------------
5191 1. Change 4.43/35 introduced a bug that caused file counts to be
5192 incorrectly computed when quota_filecount was set in an appendfile
5195 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5196 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5199 3. Give more explanation in the error message when the command for a transport
5200 filter fails to execute.
5202 4. There are several places where Exim runs a non-Exim command in a
5203 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5204 was being done only for the command run by the queryprogram router. It is
5205 now done for all such subprocesses. The other cases are: ${run, transport
5206 filters, and the commands run by the lmtp and pipe transports.
5208 5. Some older OS have a limit of 256 on the maximum number of file
5209 descriptors. Exim was using setrlimit() to set 1000 as a large value
5210 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5211 systems. I've change it so that if it can't get 1000, it tries for 256.
5213 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5214 was an oversight, and furthermore, ever since the addition of extra
5215 controls (e.g. 4.43/32), the checks on when to allow different forms of
5216 "control" were broken. There should now be diagnostics for all cases when a
5217 control that does not make sense is encountered.
5219 7. $recipients is now available in the predata ACL (oversight).
5221 8. Tidy the search cache before the fork to do a delivery from a message
5222 received from the command line. Otherwise the child will trigger a lookup
5223 failure and thereby defer the delivery if it tries to use (for example) a
5224 cached ldap connection that the parent has called unbind on.
5226 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5227 of $address_data from the recipient verification was clobbered by the
5228 sender verification.
5230 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5231 was its contents. (It was OK if the option was not defined at all.)
5233 11. A "Completed" log line is now written for messages that are removed from
5234 the spool by the -Mrm option.
5236 12. $host_address is now set to the target address during the checking of
5237 ignore_target_hosts.
5239 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5240 being passed; this would have caused $sender_host_name to have been used if
5241 matching the list had actually called for a host name (not very likely,
5242 since this list is usually IP addresses). A host name is now passed as
5245 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5246 code that specifies a non-restarting handler (typically sigaction() in
5247 modern systems) in an attempt to fix a rare and obscure crash bug.
5249 15. Narrowed the window for a race in the daemon that could cause it to ignore
5250 SIGCHLD signals. This is not a major problem, because they are used only to
5251 wake it up if nothing else does.
5253 16. A malformed maildirsize file could cause Exim to calculate negative values
5254 for the mailbox size or file count. Odd effects could occur as a result.
5255 The maildirsize information is now recalculated if the size or filecount
5258 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5259 support for a long time. Removed HAVE_SYS_VFS_H.
5261 18. Updated exipick to current release from John Jetmore.
5263 19. Allow an empty sender to be matched against a lookup in an address list.
5264 Previously the only cases considered were a regular expression, or an
5267 20. Exim went into a mad DNS lookup loop when doing a callout where the
5268 host was specified on the transport, if the DNS lookup yielded more than
5271 21. The RFC2047 encoding function was originally intended for short strings
5272 such as real names; it was not keeping to the 75-character limit for
5273 encoded words that the RFC imposes. It now respects the limit, and
5274 generates multiple encoded words if necessary. To be on the safe side, I
5275 have increased the buffer size for the ${rfc2047: expansion operator from
5278 22. Failure to deliver a bounce message always caused it to be frozen, even if
5279 there was an errors_to setting on the router. The errors_to setting is now
5282 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5283 canonical form (fully expanded) before being placed in
5284 $sender_host_address.
5286 24. Updated eximstats to version 1.33
5288 25. Include certificate and key file names in error message when GnuTLS fails
5289 to set them up, because the GnuTLS error message doesn't include the name
5290 of the failing file when there is a problem reading it.
5292 26. Expand error message when OpenSSL has problems setting up cert/key files.
5295 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5296 (this can affect the format of dates).
5298 28. exim_tidydb, when checking for the continued existence of a message for
5299 which it has found a message-specific retry record, was not finding
5300 messages that were in split spool directories. Consequently, it was
5301 deleting retry records that should have stayed in existence.
5303 29. eximstats updated to version 1.35
5304 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5305 1.35 - bugfix such that pie charts by volume are generated correctly
5307 30. The SPA authentication driver was not abandoning authentication and moving
5308 on to the next authenticator when an expansion was forced to fail,
5309 contradicting the general specification for all authenticators. Instead it
5310 was generating a temporary error. It now behaves as specified.
5312 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5313 (the order specifies the preference for clients). The order is now AES256,
5314 AES128, 3DES, ARCFOUR128.
5316 31. Small patch to Sieve code - explicitly set From: when generating an
5319 32. Exim crashed if a remote delivery caused a very long error message to be
5320 recorded - for instance if somebody sent an entire SpamAssassin report back
5321 as a large number of 550 error lines. This bug was coincidentally fixed by
5322 increasing the size of one of Exim's internal buffers (big_buffer) that
5323 happened as part of the Exiscan merge. However, to be on the safe side, I
5324 have made the code more robust (and fixed the comments that describe what
5327 33. Some experimental protocols are using DNS PTR records for new purposes. The
5328 keys for these records are domain names, not reversed IP addresses. The
5329 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5330 leaves it alone. Component reversal etc. now happens only for IP addresses.
5333 34. The host_aton() function is supposed to be passed a string that is known
5334 to be a valid IP address. However, in the case of IPv6 addresses, it was
5335 not checking this. This is a hostage to fortune. Exim now panics and dies
5336 if the condition is not met. A case was found where this could be provoked
5337 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5338 components; fortuitously, this particular loophole had already been fixed
5339 by change 4.50/55 or 4.44/33 above.
5341 If there are any other similar loopholes, the new check in host_aton()
5342 itself should stop them being exploited. The report I received stated that
5343 data on the command line could provoke the exploit when Exim was running as
5344 exim, but did not say which command line option was involved. All I could
5345 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5346 running as the user.
5349 35. There was a buffer overflow vulnerability in the SPA authentication code
5350 (which came originally from the Samba project). I have added a test to the
5351 spa_base64_to_bits() function which I hope fixes it.
5354 36. The daemon start-up calls getloadavg() while still root for those OS that
5355 need the first call to be done as root, but it missed one case: when
5356 deliver_queue_load_max is set with deliver_drop_privilege. This is
5357 necessary for the benefit of the queue runner, because there is no re-exec
5358 when deliver_drop_privilege is set.
5360 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5361 was in use, was not putting the data itself into the right store pool;
5362 consequently, it could be overwritten for a subsequent message in the same
5363 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5366 38. Sometimes the final signoff response after QUIT could fail to get
5367 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5368 < 0 before doing a fflush(). This bug looks as though it goes back to the
5369 introduction of TLS in release 3.20, but "sometimes" must have been rare
5370 because the tests only now provoked it.
5376 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5377 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5378 Now it returns an integer. A number of calls were still expecting a T/F
5379 return. Fortuitously, in all cases, the tests worked in OK situations,
5380 which is the norm. However, things would have gone wrong on any write
5381 failures on the smtp file descriptor. This function is used when sending
5382 messages over SMTP and also when doing verify callouts.
5384 2. When Exim is called to do synchronous delivery of a locally submitted
5385 message (the -odf or -odi options), it no longer closes stderr before doing
5388 3. Implemented the mua_wrapper option.
5390 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5392 5. Implemented the functions header_remove(), header_testname(),
5393 header_add_at_position(), and receive_remove_recipient(), and exported them
5396 6. If an ACL "warn" statement specified the addition of headers, Exim already
5397 inserted X-ACL-Warn: at the start if there was no header name. However, it
5398 was not making this test for the second and subsequent header lines if
5399 there were newlines in the string. This meant that an invalid header could
5400 be inserted if Exim was badly configured.
5402 7. Allow an ACL "warn" statement to add header lines at the start or after all
5403 the Received: headers, as well as at the end.
5405 8. Added the rcpt_4xx retry error code.
5407 9. Added postmaster_mailfrom=xxx to callout verification option.
5409 10. Added mailfrom=xxxx to the callout verification option, for verify=
5412 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5413 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5415 12. Inserted some casts to stop certain compilers warning when using pointer
5416 differences as field lengths or precisions in printf-type calls (mostly
5417 affecting debugging statements).
5419 13. Added optional readline() support for -be (dynamically loaded).
5421 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5422 same clock tick as a message's arrival, so that its received time was the
5423 same as the "first fail" time on the retry record, and that message
5424 remained on the queue past the ultimate address timeout, every queue runner
5425 would try a delivery (because it was past the ultimate address timeout) but
5426 after another failure, the ultimate address timeout, which should have then
5427 bounced the address, did not kick in. This was a "< instead of <=" error;
5428 in most cases the first failure would have been in the next clock tick
5429 after the received time, and all would be well.
5431 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5432 being recognized when the domain list was tested by the match_domain
5433 condition in an expansion string.
5435 16. Added the ${str2b64: operator.
5437 17. Exim was always calling setrlimit() to set a large limit for the number of
5438 processes, without checking whether the existing limit was already
5439 adequate. (It did check for the limit on file descriptors.) Furthermore,
5440 errors from getrlimit() and setrlimit() were being ignored. Now they are
5441 logged to the main and panic logs, but Exim does carry on, to try to do its
5442 job under whatever limits there are.
5444 18. Imported PCRE 5.0.
5446 19. Trivial typo in log message " temporarily refused connection" (the leading
5449 20. If the log selector return_path_on_delivery was set and an address was
5450 redirected to /dev/null, the delivery process crashed because it assumed
5451 that a return path would always be set for a "successful" delivery. In this
5452 case, the whole delivery is bypassed as an optimization, and therefore no
5455 21. Internal re-arrangement: the function for sending a challenge and reading
5456 a response while authentication was assuming a zero-terminated challenge
5457 string. It's now changed to take a pointer and a length, to allow for
5458 binary data in such strings.
5460 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5462 23. Exim was not respecting finduser_retries when seeking the login of the
5463 uid under which it was called; it was always trying 10 times. (The default
5464 setting of finduser_retries is zero.) Also, it was sleeping after the final
5465 failure, which is pointless.
5467 24. Implemented tls_on_connect_ports.
5469 25. Implemented acl_smtp_predata.
5471 26. If the domain in control=submission is set empty, Exim assumes that the
5472 authenticated id is a complete email address when it generates From: or
5473 Sender: header lines.
5475 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5476 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5477 chown and chgrp in /bin and hostname in /usr/bin.
5479 28. Exim was keeping the "process log" file open after each use, just as it
5480 does for the main log. This opens the possibility of it remaining open for
5481 long periods when the USR1 signal hits a daemon. Occasional processlog
5482 errors were reported, that could have been caused by this. Anyway, it seems
5483 much more sensible not to leave this file open at all, so that is what now
5486 29. The long-running daemon process does not normally write to the log once it
5487 has entered its main loop, and it closes the log before doing so. This is
5488 so that log files can straightforwardly be renamed and moved. However,
5489 there are a couple of unusual error situations where the daemon does write
5490 log entries, and I had neglected to close the log afterwards.
5492 30. The text of an SMTP error response that was received during a remote
5493 delivery was being truncated at 512 bytes. This is too short for some of
5494 the long messages that one sometimes sees. I've increased the limit to
5497 31. It is now possible to make retry rules that apply only when a message has a
5498 specific sender, in particular, an empty sender.
5500 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5501 it possible to be selective about when SMTP synchronization is enforced.
5503 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5505 32. Implemented hosts_connection_nolog.
5507 33. Added an ACL for QUIT.
5509 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5512 35. Added mailbox_size and mailbox_filecount to appendfile.
5514 36. Added control = no_multiline_responses to ACLs.
5516 37. There was a bug in the logic of the code that waits for the clock to tick
5517 in the case where the clock went backwards by a substantial amount such
5518 that the microsecond fraction of "now" was more than the microsecond
5519 fraction of "then" (but the whole seconds number was less).
5521 38. Added support for the libradius Radius client library this is found on
5522 FreeBSD (previously only the radiusclient library was supported).
5528 1. When certain lookups returned multiple values in the form name=value, the
5529 quoting of the values was not always being done properly. Specifically:
5530 (a) If the value started with a double quote, but contained no whitespace,
5532 (b) If the value contained whitespace other than a space character (i.e.
5533 tabs or newlines or carriage returns) it was not quoted.
5534 This fix has been applied to the mysql and pgsql lookups by writing a
5535 separate quoting function and calling it from the lookup code. The fix
5536 should probably also be applied to nisplus, ibase and oracle lookups, but
5537 since I cannot test any of those, I have not disturbed their existing code.
5539 2. A hit in the callout cache for a specific address caused a log line with no
5540 reason for rejecting RCPT. Now it says "Previous (cached) callout
5541 verification failure".
5543 3. There was an off-by-one bug in the queryprogram router. An over-long
5544 return line was truncated at 256 instead of 255 characters, thereby
5545 overflowing its buffer with the terminating zero. As well as fixing this, I
5546 have increased the buffer size to 1024 (and made a note to document this).
5548 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5549 when Exim is waiting for an SMTP response from a remote server, Exim
5550 restarts its select() call on the socket, thereby resetting its timeout.
5551 This is not a problem when such interrupts are rare. Somebody set up a cron
5552 job to run exiwhat every 2 minutes, which is less than the normal select()
5553 timeout (5 or 10 minutes). This meant that the select() timeout never
5554 kicked in because it was always reset. I have fixed this by comparing the
5555 time when an interrupt arrives with the time at the start of the first call
5556 to select(). If more time than the timeout has elapsed, the interrupt is
5557 treated as a timeout.
5559 5. Some internal re-factoring in preparation for the addition of Sieve
5560 extensions (by MH). In particular, the "personal" test is moved to a
5561 separate function, and given an option for scanning Cc: and Bcc: (which is
5562 not set for Exim filters).
5564 6. When Exim created an email address using the login of the caller as the
5565 local part (e.g. when creating a From: or Sender: header line), it was not
5566 quoting the local part when it contained special characters such as @.
5568 7. Installed new OpenBSD configuration files.
5570 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5571 try to make them clearer.
5573 9. Callout options, other than the timeout value, were being ignored when
5574 verifying sender addresses in header lines. For example, when using
5576 verify = header_sender/callout=no_cache
5578 the cache was (incorrectly) being used.
5580 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5581 only the Cygwin environment.
5583 11. When return_path_on_delivery was set as a log selector, if different remote
5584 addresses in the same message used different return paths and parallel
5585 remote delivery occurred, the wrong values would sometimes be logged.
5586 (Whenever a remote delivery process finished, the return path value from
5587 the most recently started remote delivery process was logged.)
5589 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5590 lines when AUTH and/or TLS are in use. This is the "received protocol"
5591 field. Exim used to use "asmtp" for authenticated SMTP, without any
5592 indication (in the protocol name) for TLS use. Now it follows the RFC and
5593 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5594 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5595 names appear in log lines as well as in Received: header lines.
5597 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5598 extensions, and comparison tests, and to fix some bugs.
5600 14. Changes to the "personal" filter test:
5602 (1) The test was buggy in that it was just doing the equivalent of
5603 "contains" tests on header lines. For example, if a user's address was
5604 anne@some.where, the "personal" test would incorrectly be true for
5606 To: susanne@some.where
5608 This test is now done by extracting each address from the header in turn,
5609 and checking the entire address. Other tests that are part of "personal"
5610 are now done using regular expressions (for example, to check local parts
5611 of addresses in From: header lines).
5613 (2) The list of non-personal local parts in From: addresses has been
5614 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5615 taken from the Sieve specification recommendations.
5617 (3) If the message contains any header line starting with "List-" it is
5618 treated as non-personal.
5620 (4) The test for "circular" in the Subject: header line has been removed
5621 because it now seems ill-conceived.
5623 15. Minor typos in src/EDITME comments corrected.
5625 16. Installed latest exipick from John Jetmore.
5627 17. If headers_add on a router specified a text string that was too long for
5628 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5629 of string_sprintf() is now avoided.
5631 18. $message_body_size was not set (it was always zero) when running the DATA
5632 ACL and the local_scan() function.
5634 19. For the "mail" command in an Exim filter, no default was being set for
5635 the once_repeat time, causing a random time value to be used if "once" was
5636 specified. (If the value happened to be <= 0, no repeat happened.) The
5637 default is now 0s, meaning "never repeat". The "vacation" command was OK
5638 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5639 (I found it when inspecting the code).
5641 20. There is now an overall timeout for performing a callout verification. It
5642 defaults to 4 times the callout timeout, which applies to individual SMTP
5643 commands during the callout. The overall timeout applies when there is more
5644 than one host that can be tried. The timeout is checked before trying the
5645 next host. This prevents very long delays if there are a large number of
5646 hosts and all are timing out (e.g. when the network connections are timing
5647 out). The value of the overall timeout can be changed by specifying an
5648 additional sub-option for "callout", called "maxwait". For example:
5650 verify = sender/callout=5s,maxwait=20s
5652 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5653 to the end before writing, but this should make it even safer).
5655 22. Exim was forgetting that it had advertised PIPELINING for the second and
5656 subsequent messages on an SMTP connection. It was also not resetting its
5657 memory on STARTTLS and an internal HELO.
5659 23. When Exim logs an SMTP synchronization error within a session, it now
5660 records whether PIPELINING has been advertised or not.
5662 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5663 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5664 rather than long int.
5666 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5668 26. Added the never_mail option to autoreply.
5674 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5675 crash if the getsockname() call failed; this can happen if a connection is
5676 closed very soon after it is established. The problem was simply in the
5677 order in which certain operations were done, causing Exim to try to write
5678 to the SMTP stream before it had set up the file descriptor. The bug has
5679 been fixed by making things happen in the correct order.
5685 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5686 before the connection was closed, thus losing the rejection response.
5688 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5689 some early Solaris releases, but causes trouble in current releases where
5690 socklen_t is defined.
5692 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5695 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5698 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5699 that releasing the top of it at the end releases what was used for sub-
5700 expansions (unless the block got too big). However, discard this block if
5701 the first thing is a variable or header, so that we can use its block when
5702 it is dynamic (useful for very large $message_headers, for example).
5704 6. Lookups now cache *every* query, not just the most recent. A new, separate
5705 store pool is used for this. It can be recovered when all lookup caches are
5706 flushed. Lookups now release memory at the end of their result strings.
5707 This has involved some general refactoring of the lookup sources.
5709 7. Some code has been added to the store_xxx() functions to reduce the amount
5710 of flapping under certain conditions.
5712 8. log_incoming_interface used to affect only the <= reception log lines. Now
5713 it causes the local interface and port to be added to several more SMTP log
5714 lines, for example "SMTP connection from", and rejection lines.
5716 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5718 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5720 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5721 could be overwritten at the end of the current message (or the start of a
5722 new message if it was set in a HELO ACL). The value is now preserved for
5723 the duration of the SMTP connection.
5725 12. If a transport had a headers_rewrite setting, and a matching header line
5726 contained an unqualified address, that address was qualified, even if it
5727 did not match any rewriting rules. The underlying bug was that the values
5728 of the flags that permit the existence of unqualified sender and recipient
5729 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5730 non-local messages, and by -bnq for local messages) were not being
5731 preserved with the message after it was received.
5733 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5734 "next input=" as part of the text comprising the host identity instead of
5735 the correct text. The code was using the same buffer for two different
5736 strings. However, depending on which order the printing function evaluated
5737 its arguments, the bug did not always show up. Under Linux, for example, my
5738 test suite worked just fine.
5740 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5741 doesn't work with some older versions of Perl. It has been changed to "my",
5742 which in any case is probably the better facility to use.
5744 15. A really picky compiler found some instances of statements for creating
5745 error messages that either had too many or two few arguments for the format
5748 16. The size of the buffer for calls to the DNS resolver has been increased
5749 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5750 for addresses that have a lot of PTR records. This alleviates a problem; it
5751 does not fully solve it.
5753 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5754 buffer now truncates the list and logs the incident, which is the same
5755 action as happens when Exim is looking up a host name and its aliases.
5756 Previously in this situation something unpredictable would happen;
5757 sometimes it was "internal error: store_reset failed".
5759 18. If a server dropped the connection unexpectedly when an Exim client was
5760 using GnuTLS and trying to read a response, the client delivery process
5761 crashed while trying to generate an error log message.
5763 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5764 string, for example:
5766 warn message = H1: something\nH2: something
5768 the text was added as a single header line from Exim's point of view
5769 though it ended up OK in the delivered message. However, searching for the
5770 second and subsequent header lines using $h_h2: did not work. This has been
5771 fixed. Similarly, if a system filter added multiple headers in this way,
5772 the routers could not see them.
5774 20. Expanded the error message when iplsearch is called with an invalid key to
5775 suggest using net-iplsearch in a host list.
5777 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5778 ACLs are no longer actually imposed (and a message to that effect is
5781 22. If a "gecos" field in a passwd entry contained escaped characters, in
5782 particular, if it contained a \" sequence, Exim got it wrong when building
5783 a From: or a Sender: header from that name. A second bug also caused
5784 incorrect handling when an unquoted " was present following a character
5785 that needed quoting.
5787 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5788 was not being matched caselessly.
5790 24. Arranged for all hyphens in the exim.8 source to be escaped with
5793 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5794 properly. Recipient callout cache records were still being keyed to include
5795 the sender, even when use_sender was set false. This led to far more
5796 callouts that were necessary. The sender is no longer included in the key
5797 when use_sender is false.
5799 26. Added "control = submission" modifier to ACLs.
5801 27. Added the ${base62d: operator to decode base 62 numbers.
5803 28. dnsdb lookups can now access SRV records.
5805 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5806 the configuration file.
5808 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5809 (-v) mode. This makes the output for a verbose queue run more intelligible.
5811 31. Added a use_postmaster feature to recipient callouts.
5813 32. Added the $body_zerocount variable, containing the number of binary zero
5814 bytes in the message body.
5816 33. The time of last modification of the "new" subdirectory is now used as the
5817 "mailbox time last read" when there is a quota error for a maildir
5820 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5822 35. Added +ignore_unknown as a special item in host lists.
5824 36. Code for decoding IPv6 addresses in host lists is now included, even if
5825 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5826 address was recognized as an IP address, but was then not correctly decoded
5827 into binary, causing unexpected and incorrect effects when compared with
5834 1. Very minor rewording of debugging text in manualroute to say "list of
5835 hosts" instead of "hostlist".
5837 2. If verify=header_syntax was set, and a header line with an unqualified
5838 address (no domain) and a large number of spaces between the end of the
5839 name and the colon was received, the reception process suffered a buffer
5840 overflow, and (when I tested it) crashed. This was caused by some obsolete
5841 code that should have been removed. The fix is to remove it!
5843 3. When running in the test harness, delay a bit after writing a bounce
5844 message to get a bit more predictability in the log output.
5846 4. Added a call to search_tidyup() just before forking a reception process. In
5847 theory, someone could use a lookup in the expansion of smtp_accept_max_
5848 per_host which, without the tidyup, could leave open a database connection.
5850 5. Added the variables $recipient_data and $sender_data which get set from a
5851 lookup success in an ACL "recipients" or "senders" condition, or a router
5852 "senders" option, similar to $domain_data and $local_part_data.
5854 6. Moved the writing of debug_print from before to after the "senders" test
5857 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5858 problems for message scanning, either using a data ACL, or using
5859 local_scan() because the Received: header was not generated till after they
5860 were called (in order to set the time as the time of reception completion).
5861 I have revised the way this works. The header is now generated after the
5862 body is received, but before the ACL or local_scan() are called. After they
5863 are run, the timestamp in the header is updated.
5869 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5870 before starting a queue runner without re-exec. This happened only when
5871 deliver_drop_privilege was set or when the Exim user was set to root. The
5872 effect of the bug was that timeouts during subsequent deliveries caused
5873 crashes instead of being properly handled. The handler is now left at its
5874 default (and expected) setting.
5876 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5877 message, again when deliver_drop_privilege is set or Exim is run as root.
5878 The bug described in (1) was not present in this case, but the tidying up
5879 of the other signals was missing. I have made the two cases consistent.
5881 3. The ignore_target_hosts setting on a manualroute router was being ignored
5882 for hosts that were looked up using the /MX notation.
5884 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5887 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5888 operated on the sender address. After changing the $sender_address to <>
5889 for the sender address verify, Exim was re-instated it as the original
5890 (before rewriting) address, but remembering that it had rewritten it, so it
5891 wasn't rewriting it again. This bug also had the effect of breaking the
5892 sender address verification caching when the sender address was rewritten.
5894 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5895 This has been changed so that if the ip literal address matches
5896 ignore_target_hosts, the router declines.
5898 7. Added expansion conditions match_domain, match_address, and match_local_
5899 part (NOT match_host).
5901 8. The placeholder for the Received: header didn't have a length field set.
5903 9. Added code to Exim itself and to exim_lock to test for a specific race
5904 condition that could lead to file corruption when using MBX delivery. The
5905 issue is with the lockfile that is created in /tmp. If this file is removed
5906 after a process has opened it but before that process has acquired a lock,
5907 there is the potential for a second process to recreate the file and also
5908 acquire a lock. This could lead to two Exim processes writing to the file
5909 at the same time. The added code performs the same test as UW imapd; it
5910 checks after acquiring the lock that its file descriptor still refers to
5911 the same named file.
5913 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5914 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5917 11. Added the smtp_active_hostname option. If used, this will typically be made
5918 to depend on the incoming interface address. Because $interface_address is
5919 not set up until the daemon has forked a reception process, error responses
5920 that can happen earlier (such as "too many connections") no longer contain
5923 12. If an expansion in a condition on a "warn" statement fails because a lookup
5924 defers, the "warn" statement is abandoned, and the next ACL statement is
5925 processed. Previously this caused the whole ACL to be aborted.
5927 13. Added the iplsearch lookup type.
5929 14. Added ident_timeout as a log selector.
5931 15. Added tls_certificate_verified as a log selector.
5933 16. Added a global option tls_require_ciphers (compare the smtp transport
5934 option of the same name). This controls incoming TLS connections.
5936 17. I finally figured out how to make tls_require_ciphers do a similar thing
5937 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5938 before starting the TLS session.
5940 18. Tabs are now shown as \t in -bP output.
5942 19. If the log selector return_path_on_delivery was set, Exim crashed when
5943 bouncing a message because it had too many Received: header lines.
5945 20. If two routers both had headers_remove settings, and the first one included
5946 a superfluous trailing colon, the final name in the first list and the
5947 first name in the second list were incorrectly joined into one item (with a
5948 colon in the middle).
5954 1. Added -C and -D options to the exinext utility, mainly to make it easier
5955 to include in the automated testing, but these could be helpful when
5956 multiple configurations are in use.
5958 2. The exinext utility was not formatting the output nicely when there was
5959 an alternate port involved in the retry record key, nor when there was a
5960 message id as well (for retries that were specific to a specific message
5961 and a specific host). It was also confused by IPv6 addresses, because of
5962 the additional colons they contain. I have fixed the IPv4 problem, and
5963 patched it up to do a reasonable job for IPv6.
5965 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5966 delivery, the log line now contains "pipelined" if PIPELINING was used.
5968 4. An SMTP transport process used to panic and die if the bind() call to set
5969 an explicit outgoing interface failed. This has been changed; it is now
5970 treated in the same way as a connect() failure.
5972 5. A reference to $sender_host_name in the part of a conditional expansion
5973 that was being skipped was still causing a DNS lookup. This no longer
5976 6. The def: expansion condition was not recognizing references to header lines
5977 that used bh_ and bheader_.
5979 7. Added the _cache feature to named lists.
5981 8. The code for checking quota_filecount in the appendfile transport was
5982 allowing one more file than it should have been.
5984 9. For compatibility with Sendmail, the command line option
5992 and sets the incoming protocol and host name (for trusted callers). The
5993 host name and its colon can be omitted when only the protocol is to be set.
5994 Note the Exim already has two private options, -pd and -ps, that refer to
5995 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5996 "s", but I don't think that's a major issue.
5998 10. A number of refactoring changes to the code, none of which should affect
6001 (a) The number of logging options was getting close to filling up the
6002 32-bit word that was used as a bit map. I have split them into two classes:
6003 those that are passed in the argument to log_write(), and those that are
6004 only ever tested independently outside of that function. These are now in
6005 separate 32-bit words, so there is plenty of room for expansion again.
6006 There is no change in the user interface or the logging behaviour.
6008 (b) When building, for example, log lines, the code previously used a
6009 macro that called string_cat() twice, in order to add two strings. This is
6010 not really sufficiently general. Furthermore, there was one instance where
6011 it was actually wrong because one of the argument was used twice, and in
6012 one call a function was used. (As it happened, calling the function twice
6013 did not affect the overall behaviour.) The macro has been replaced by a
6014 function that can join an arbitrary number of extra strings onto a growing
6017 (c) The code for expansion conditions now uses a table and a binary chop
6018 instead of a serial search (which was left over from when there were very
6019 few conditions). Also, it now recognizes conditions like "pam" even when
6020 the relevant support is not compiled in: a suitably worded error message is
6021 given if an attempt is made to use such a condition.
6023 11. Added ${time_interval:xxxxx}.
6025 12. A bug was causing one of the ddress fields not to be passed back correctly
6026 from remote delivery subprocesses. The field in question was not being
6027 subsequently used, so this caused to problems in practice.
6029 13. Added new log selectors queue_time and deliver_time.
6031 14. Might have fixed a bug in maildirsizefile handling that threw up
6032 "unexpected character" debug warnings, and recalculated the data
6033 unnecessarily. In any case, I expanded the warning message to give more
6036 15. Added the message "Restricted characters in address" to the statements in
6037 the default ACL that block characters like @ and % in local parts.
6039 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6040 Three changes have been made:
6042 (a) There was a serious bug; a negative response to MAIL caused the whole
6043 recipient domain to be cached as invalid, thereby blocking all messages
6044 to all local parts at the same domain, from all senders. This bug has
6045 been fixed. The domain is no longer cached after a negative response to
6046 MAIL if the sender used is not empty.
6048 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6051 (c) A new callout option, "use_sender" has been added for people who want
6052 the modified behaviour.
6058 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6061 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6062 indeed breaks things for older releases.
6064 3. Added additional logging to the case where there is a problem reading data
6065 from a filter that is running in a subprocess using a pipe, in order to
6066 try to track down a specific problem.
6068 4. Testing facility fudge: when running in the test harness and attempting
6069 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6070 getting "No route to host". Convert this to a timeout.
6072 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6075 6. Some OS don't have socklen_t but use size_t instead. This affects the
6076 fifth argument of getsockopt() amongst other things. This is now
6077 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6078 can be set for individual OS. I have set it for SunOS5, OSF1, and
6079 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6080 some earlier ones do not.
6082 7. Change 4.30/15 was not doing the test caselessly.
6084 8. The standard form for an IPv6 address literal was being rejected by address
6085 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6086 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6087 this, as well as the form without the "IPv6" on the front (but only when
6088 address literals are enabled, of course).
6090 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6092 10. Exim crashed if a message with an empty sender address specified by -f
6093 encountered a router with an errors_to setting. This could be provoked only
6094 by a command such as
6098 where an empty string was supplied; "<>" did not hit this bug.
6100 11. Installed PCRE release 4.5.
6102 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6103 remained set. It is now erased.
6105 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6106 times from message ids (which are base 36 rather than the normal 62).
6108 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6109 were being counted as actual protocol errors, and logged if the log
6110 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6111 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6112 and DATA following a set of rejected RCPTs do not count as protocol errors.
6113 In other words, Exim assumes they were pipelined, though this may not
6114 actually be the case. Of course, in all cases the client gets an
6115 appropriate error code.
6117 15. If a lookup fails in an ACL condition, a message about the failure may
6118 be available; it is used if testing the ACL cannot continue, because most
6119 such messages specify what the cause of the deferral is. However, some
6120 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6121 that caused an old message to be retained and used if a later statement
6122 caused a defer, replacing the real cause of the deferral.
6124 16. If an IP address had so many PTR records that the DNS lookup buffer
6125 was not large enough to hold them, Exim could crash while trying to process
6126 the truncated data. It now detects and logs this case.
6128 17. Further to 4.21/58, another change has been made: if (and only if) the
6129 first line of a message (the first header line) ends with CRLF, a bare LF
6130 in a subsequent header line has a space inserted after it, so as not to
6131 terminate the header.
6133 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6134 unnecessarily, used atoi() instead of strtol(), and didn't check the
6135 termination when getting file sizes from file names by regex.
6137 19. Completely re-implemented the support for maildirsize files, in the light
6138 of a number of problems with the previous contributed implementation
6139 (4.30/29). In particular:
6141 . If the quota is zero, the maildirsize file is maintained, but no quota is
6144 . If the maildir directory does not exist, it is created before any attempt
6145 to write a maildirsize file.
6147 . The quota value in the file is just a cache; if the quota is changed in
6148 the transport, the new value overrides.
6150 . A regular expression is available for excluding directories from the
6153 20. The autoreply transport checks the characters in options that define the
6154 message's headers; it allows continued headers, but it was checking with
6155 isspace() after an embedded newline instead of explicitly looking for a
6158 21. If all the "regular" hosts to which an address was routed had passed their
6159 expiry times, and had not reached their retry times, the address was
6160 bounced, even if fallback hosts were defined. Now Exim should go on to try
6163 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6164 equivalent code in the SMTP transport. Some hosts send humungous responses
6165 to HELO/EHLO, more than 1024 it seems.
6167 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6168 gives compiler warnings in some environments. I've now done it "properly",
6171 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6172 (because of problems with the built-in one) was declared to return uschar *
6173 instead of char *, causing compiler failure.
6175 25. Fixed a file descriptor leak when processing alias/forward files.
6177 26. Fixed a minor format string issue in dbfn.c.
6179 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6181 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6182 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6185 29. When a sender address is verified, it is cached, to save repeating the test
6186 when there is more than one recipient in a message. However, when the
6187 verification involves a callout, it is possible for different callout
6188 options to be set for different recipients. It is too complicated to keep
6189 track of this in the cache, so now Exim always runs a verification when a
6190 callout is required, relying on the callout cache for the optimization.
6191 The overhead is duplication of the address routing, but this should not be
6194 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6195 to be verified with callout=postmaster, and the main callout worked but the
6196 postmaster check failed, the verification correctly failed. However, if a
6197 subsequent RCPT command asked for sender verification *without* the
6198 postmaster check, incorrect caching caused this verification also to fail,
6201 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6202 it was not caching the DNS options (qualify_single, search_parents) that
6203 were used when the lookup failed. A subsequent lookup with different
6204 options therefore always gave the same answer, though there were cases
6205 where it should not have. (Example: a "domains = !$mx_any" option on a
6206 dnslookup router: the "domains" option is always processed without any
6207 widening, but the router might have qualify_single set.) Now Exim uses the
6208 cached value only when the same options are set.
6210 32. Added John Jetmore's "exipick" utility to the distribution.
6212 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6213 than a timeout (e.g. a certificate is required, and is not provided), an
6214 Exim server now closes the connection immediately. Previously it waited for
6215 the client to close - but if the client is SSL, it seems that they each
6216 wait for each other, leading to a delay before one of them times out.
6218 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6219 maintained 0.8.x compatibility because I don't think many are using it, and
6220 it is clearly obsolete.
6222 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6225 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6226 client certificate was expired. A simple patch fixes this, though I don't
6227 understand the full logic of why the verify callback is called multiple
6230 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6231 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6232 which causes problems with some clients (such as the Certicom SSL Plus
6233 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6234 disables the coutermeasure allowing Eudora to connect."
6236 38. Exim was not checking that a write() to a log file succeeded. This could
6237 lead to Bad Things if a log got too big, in particular if it hit a file
6238 size limit. Exim now panics and dies if it cannot write to a log file, just
6239 as it does if it cannot open a log file.
6241 39. Modified OS/Makefile-Linux so that it now contains
6243 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6245 The two -D definitions ensure that Exim is compiled with large file
6246 support, which makes it possible to handle log files that are bigger than
6249 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6250 instance) a domain was checked against a named list that involved a lookup,
6251 causing $domain_data to be set, then another domain was checked against the
6252 same list, then the first domain was re-checked, the value of $domain_data
6253 after the final check could be wrong. In particular, if the second check
6254 failed, it could be set empty. This bug probably also applied to
6257 41. The strip_trailing_dot option was not being applied to the address given
6258 with the -f command-line option.
6260 42. The code for reading a message's header from the spool was incrementing
6261 $received_count, but never initializing it. This meant that the value was
6262 incorrect (doubled) while delivering a message in the same process in which
6263 it was received. In the most common configuration of Exim, this never
6264 happens - a fresh exec is done - but it can happen when
6265 deliver_drop_privilege is set.
6267 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6268 it now includes up to 150 characters of the unexpected data in the log
6271 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6272 and building data strings. The size of both of these buffers was 10 000
6273 bytes - far larger than anybody would *ever* want, thought I. Needless to
6274 say, somebody hit the limit. I have increased the maximum line length to
6275 20 000 and the maximum data length of concatenated lines to 100 000. I have
6276 also fixed two bugs, because there was no checking on these buffers. Tsk,
6277 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6278 buffer is too small.
6280 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6281 lsearch lookups. Now it does.
6283 46. When parsing a route_list item in a manualroute router, a fixed-length
6284 buffer was used for the list of hosts. I made this 1024 bytes long,
6285 thinking that nobody would ever have a list of hosts that long. Wrong.
6286 Somebody had a whole pile of complicated expansion conditions, and the
6287 string was silently truncated, leading to an expansion error. It turns out
6288 that it is easier to change to an unlimited length (owing to other changes
6289 that have happened since this code was originally written) than to build
6290 structure for giving a limitation error. The length of the item that
6291 expands into the list of hosts is now unlimited.
6293 47. The lsearch lookup could not handle data where the length of text line was
6294 more than 4095 characters. Such lines were truncated, leading to shortened
6295 data being returned. It should now handle lines of any length.
6297 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6298 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6301 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6302 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6303 no longer happens in comment lines. A list of replacements is now placed
6304 at the head of all of the source files, except those whose only change is
6305 to replace PERL_COMMAND in the very first #! line.
6307 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6308 messages on the queue, with a bottom-up merge sort, using code contributed
6309 by Michael Haardt. This should make operations like -bp somewhat faster on
6310 large queues. It won't affect queue runners, except when queue_run_in_order
6313 51. Installed eximstats 1.31 in the distribution.
6315 52. Added support for SRV lookups to the dnslookup router.
6317 53. If an ACL referred to $message_body or $message_body_end, the value was not
6318 reset for any messages that followed in the same SMTP session.
6320 54. The store-handling optimization for building very long strings was not
6321 differentiating between the different store pools. I don't think this
6322 actually made any difference in practice, but I've tidied it.
6324 55. While running the routers to verify a sender address, $sender_address
6325 was still set to the sender address. This is wrong, because when routing to
6326 send a bounce to the sender, it would be empty. Therefore, I have changed
6327 it so that, while verifying a sender address, $sender_address is set to <>.
6328 (There is no change to what happens when verifying a recipient address.)
6330 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6331 target A or AAAA records (if not already returned) without resetting the
6332 qualify_single or search_parents options of the DNS resolver. These are
6333 inappropriate in this case because the targets of MX and SRV records must
6334 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6335 target that, when qualified, matched something in the local domain. These
6336 two options are now turned off when doing these lookups.
6338 57. It seems that at least some releases of Reiserfs (which does not have the
6339 concept of a fixed number of inodes) returns zero and not -1 for the
6340 number of available inodes. This interacted badly with check_spool_inodes,
6341 which assumed that -1 was the "no such thing" setting. What I have done is
6342 to check that the total number of inodes is greater than zero before doing
6343 the test of how many are available.
6345 58. When a "warn" ACL statement has a log_message modifier, the message is
6346 remembered, and not repeated. This is to avoid a lot of repetition when a
6347 message has many recipients that cause the same warning to be written.
6348 However, Exim was preserving the list of already written lines for an
6349 entire SMTP session, which doesn't seem right. The memory is now reset if a
6350 new message is started.
6352 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6353 debugging output unless log_rewrite was also set.
6355 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6356 of (int)(handle) when we know that handle contains (void *)(-1).
6358 61. The Exim daemon panic-logs an error return when it closes the incoming
6359 connection. However "connection reset by peer" seems to be common, and
6360 isn't really an error worthy of noting specially, so that particular error
6363 62. When Exim is trying to find all the local interfaces, it used to panic and
6364 die if the ioctl to get the interface flags failed. However, it seems that
6365 on at least one OS (Solaris 9) it is possible to have an interface that is
6366 included in the list of interfaces, but for which you get a failure error
6367 for this call. This happens when the interface is not "plumbed" into a
6368 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6369 failure of the "get flags" call assumes that the interface is down.
6371 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6372 makes life easier for people who are doing arithmetic on fields extracted
6373 from dates, where you often get leading zeros that should not be
6374 interpreted as octal.
6376 64. Added qualify_domain to the redirect router, to override the global
6379 65. If a pathologically long header line contained very many addresses (the
6380 report of this problem mentioned 10 000) and each of them was rewritten,
6381 Exim could use up a very large amount of memory. (It kept on making new
6382 copies of the header line as it rewrote, and never released the old ones.)
6383 At the expense of a bit more processing, the header rewriting function has
6384 been changed so that it no longer eats memory in this way.
6386 66. The generation of the Received: header has been moved from the time that a
6387 message starts to be received, to the time that it finishes. The timestamp
6388 in the Received: header should now be very close to that of the <= log
6389 line. There are two side-effects of this change:
6391 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6392 logged header lines no longer include the local Received: line, because
6393 it has not yet been created. The same applies to a copy of the message
6394 that is returned to a non-SMTP sender when a message is rejected.
6396 (b) When a filter file is tested using -bf, no additional Received: header
6397 is added to the test message. After some thought, I decided that this
6400 This change does not affect the value of $received_for. It is still set
6401 after address rewriting, but before local_scan() is called.
6403 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6405 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6406 gave an unhelpful panic error message, and a defer error. I have managed to
6407 change this behaviour so that it now rejects any supplied certificate,
6408 which seems right, as the list of acceptable certificates is empty.
6410 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6411 gave an unhelpful defer error. I have not managed to make this reject any
6412 supplied certificates, but the error message it gives is "no certificate
6413 supplied", which is not helpful.
6415 70. exigrep's output now also includes lines that are not associated with any
6416 message, but which match the given pattern. Implemented by a patch from
6417 Martin Sluka, which also tidied up the Perl a bit.
6419 71. Recipient callout verification, like sender verification, was using <> in
6420 the MAIL FROM command. This isn't really the right thing, since the actual
6421 sender may affect whether the remote host accepts the recipient or not. I
6422 have changed it to use the actual sender in the callout; this means that
6423 the cache record is now keyed on a recipient/sender pair, not just the
6424 recipient address. There doesn't seem to be a real danger of callout loops,
6425 since a callout by the remote host to check the sender would use <>.
6426 [SEE ABOVE: changed after hitting problems.]
6428 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6429 temporary errors. However, in the case of such a code being given after
6430 the end of a data transmission (i.e. after ".") Exim was failing to write
6431 a retry record for the message. (Yes, there was some broken host that was
6432 actually sending 8xx at this point.)
6434 73. An unknown lookup type in a host list could cause Exim to panic-die when
6435 the list was checked. (An example that provoked this was putting <; in the
6436 middle of a list instead of at the start.) If this happened during a DATA
6437 ACL check, a -D file could be left lying around. This kind of configuration
6438 error no longer causes Exim to die; instead it causes a defer error. The
6439 incident is still logged to the main and panic logs.
6441 74. Buglet left over from Exim 3 conversion. The message "too many messages
6442 in one connection" was written to the rejectlog but not the mainlog, except
6443 when address rewriting (yes!) was being logged.
6445 75. Added write_rejectlog option.
6447 76. When a system filter was run not as root (that is, when system_filter_user
6448 was set), the values of the $n variables were not being returned to the
6449 main process; thus, they were not subsequently available in the $sn
6452 77. Added +return_path_on_delivery log selector.
6454 78. A connection timeout was being treated differently from recipients deferred
6455 when testing hosts_max_try with a message that was older than the host's
6456 retry timeout. (The host should not be counted, thus allowing all hosts to
6457 be tried at least once before bouncing.) This may have been the cause of an
6458 occasionally reported bug whereby a message would remain on the queue
6459 longer than the retry timeout, but would be bounced if a delivery was
6460 forced. I say "may" because I never totally pinned down the problem;
6461 setting up timeout/retry tests is difficult. See also the next item.
6463 79. The ultimate address timeout was not being applied to errors that involved
6464 a combination of host plus message (for example, a timeout on a MAIL
6465 command). When an address resolved to a number of possible hosts, and they
6466 were not all tried for each delivery (e.g. because of hosts_max_try), a
6467 message could remain on the queue longer than the retry timeout.
6469 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6472 81. Fixed an obscure SMTP outgoing bug which required at least the following
6473 conditions: (a) there was another message waiting for the same server;
6474 (b) the server returned 5xx to all RCPT commands in the first message so
6475 that the message was not completed; (c) the server dropped the connection
6476 or gave a negative response to the RSET that Exim sends to abort the
6477 transaction. The observed case was a dropped connection after DATA that had
6478 been sent in pipelining mode. That is, the server had advertised PIPELINING
6479 but was not implementing it correctly. The effect of the bug was incorrect
6480 behaviour, such as trying another host, and this could lead to a crash.
6486 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6487 and daemon.c were passed as pointers to ints; they should have been
6488 pointers to socklen_t variables (which are typically unsigned ints).
6490 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6493 3. Fixed a really odd bug that affected only the testing scheme; patching a
6494 certain fixed string in the binary changed the value of another string that
6495 happened to be identical to the end of the original first string.
6497 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6498 name", it returns that address as the IP address. On some operating
6499 systems (e.g. Solaris), it also passes back the IP address string as the
6500 "host name". However, on others (e.g. Linux), it passes back an empty
6501 string. Exim wasn't checking for this, and was changing the host name to an
6502 empty string, assuming it had been canonicalized.
6504 5. Although rare, it is permitted to have more than one PTR record for a given
6505 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6506 all the names associated with an address, because they do in Solaris.
6507 However, it seems that they do not in Linux for data that comes from the
6508 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6509 I found this out when I moved to a new Linux workstation and tried to run
6510 the Exim test suite.
6512 To get round this problem I have changed the code so that it now does its
6513 own call to the DNS to look up PTR records when searching for a host name.
6514 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6515 addresses that are only in /etc/hosts are still found.
6517 This behaviour is, however, controlled by an option called host_lookup_
6518 order, which defaults to "bydns:byaddr". If people want to use the other
6519 order, or indeed, just use one or the other means of lookup, they can
6520 specify it in this variable.
6522 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6523 some operating systems, this comes back from gethostbyaddr() as an empty
6524 string, and this is what Exim used to test for. However, it seems that in
6525 other systems, "." is yielded. Exim now tests for this case too.
6527 7. The values of check_spool_space and check_log_space are now held internally
6528 as a number of kilobytes instead of an absolute number of bytes. If a
6529 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6530 kilobyte. This means that much larger values can be stored.
6532 8. Exim monitor: an attempt to get the action menu when not actually pointing
6533 at a message produces an empty menu entitled "No message selected". This
6534 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6535 no entries in it ("Shell widget menu has zero width and/or height"). So I
6536 have added a single, blank menu entry in this case.
6538 9. Added ${quote_local_part.
6540 10. MIME decoding is now applied to the contents of Subject: header lines when
6543 11. Now that a reference to $sender_host_address automatically causes a reverse
6544 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6545 host lookup before query-style lookups in lists that might use this
6546 variable. This has therefore been abolished, and the "net-" prefix is no
6547 longer necessary for query-style lookups.
6549 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6550 have been a typo for LFLAGS, so it has been changed.
6552 13. The install script calls Exim with "-C /dev/null" in order to find the
6553 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6554 to be output. However, since Exim outputs its version number before the
6555 error, it didn't break the script. It just looked ugly. I fixed this by
6556 always allowing "-C /dev/null" if the caller is root.
6558 14. Ignore overlarge ACL variable number when reading spool file - insurance
6559 against a later release with more variables having written the file.
6561 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6562 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6563 this, as well as the form without the "IPv6" on the front.
6565 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6566 OS/Makefile-Darwin file.
6568 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6569 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6571 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6572 variable. However, some OS use ints for inodes. I've added cast to long int
6573 to get rid of the compiler warning.
6575 19. I had forgotten to lock out "/../" in configuration file names when
6576 ALT_CONFIG_PREFIX was set.
6578 20. Routers used for verification do not need to specify transports. However,
6579 if such a router generated a host list, and callout was configured, Exim
6580 crashed, because it could not find a port number from the (non-existent)
6581 transport. It now assumes port 25 in this circumstance.
6583 21. Added the -t option to exigrep.
6585 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6586 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6587 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6588 them is set, LOOKUP_LSEARCH is forced.
6590 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6592 24. Added sender and host information to the "rejected by local_scan()" log
6593 line; previously there was no indication of these.
6595 25. Added .include_if_exists.
6597 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6598 Linux. It turns out that not all file systems support this. Apparently some
6599 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6600 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6601 not supported on the file descriptor, is now ignored when Exim is trying to
6602 sync a directory. This applies only to Linux.
6604 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6606 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6607 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6610 29. Added support for maildirsize files from supplied patch (modified a bit).
6612 30. The use of :fail: followed by an empty string could lead Exim to respond to
6613 sender verification failures with (e.g.):
6615 550 Verification failed for <xxx>
6616 550 Sender verify failed
6618 where the first response line was missing the '-' that indicates it is not
6619 the final line of the response.
6621 31. The loop for finding the name of the user that called Exim had a hardwired
6622 limit of 10; it now uses the value of finduser_retries, which is used for
6623 all other user lookups.
6625 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6628 33. Exim was neglecting to zero errno before one call of strtol() when
6629 expanding a string and expecting an integer value. On some systems this
6630 resulted in spurious "integer overflow" errors. Also, it was casting the
6631 result into an int without checking.
6633 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6634 did not work. The code looks as if it has *never* worked, though it appears
6635 to have been documented since at least release 1.62. I have made it work.
6637 35. The "timeout_DNS" error in retry rules, also documented since at least
6638 1.62, also never worked. As it isn't clear exactly what this means, and
6639 clearly it isn't a major issue, I have abolished the feature by treating it
6640 as "timeout", and writing a warning to the main and panic logs.
6642 36. The display of retry rules for -brt wasn't always showing the error code
6645 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6646 timeout_connect_A, timeout_connect_MX.
6648 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6649 to the empty sender.
6651 39. The daemon was not analysing the content of -oX till after it had closed
6652 stderr and disconnected from the controlling terminal. This meant that any
6653 syntax errors were only noted on the panic log, and the return code from
6654 the command was 0. By re-arranging the code a little, I've made the
6655 decoding happen first, so such errors now appear on stderr, and the return
6656 code is 1. However, the actual setting up of the sockets still happens in
6657 the disconnected process, so errors there are still only recorded on the
6660 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6661 connections (as happens on some IP stacks) was logged at start up time as
6662 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6663 it from "IPv6 and IPv4", which means that two separate sockets are being
6666 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6667 says whether AF_INET or AF_INET6 was passed as an argument.
6669 42. Exiwhat output was messed up when time zones were included in log
6672 43. Exiwhat now gives more information about the daemon's listening ports,
6673 and whether -tls-on-connect was used.
6675 44. The "port" option of the smtp transport is now expanded.
6677 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6678 silently ignored. Now an error message is written to the main and panic
6681 46. There's a new ACL modifier called "logwrite" which writes to a log file
6682 as soon as it is encountered.
6684 47. Added $local_user_uid and $local_user_gid at routing time.
6686 48. Exim crashed when trying to verify a sender address that was being
6689 49. Exim was recognizing only a space character after ".include". It now also
6690 recognizes a tab character.
6692 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6693 extracting the relevant information from the specification. The man page no
6694 longer contains scrambled data for the -d option, and I've added a section
6695 at the front about calling Exim under different names.
6697 51. Added "extra_headers" argument to the "mail" command in filter files.
6699 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6702 53. Installed eximstats 1.29.
6704 54. Added transport_filter_timeout as a generic transport option.
6706 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6707 Cc: header lines. This was required by RFC 822, but it not required by RFC
6710 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6711 incoming messages that did not have them. Now it does so only if the
6712 message originates locally, that is, if there is no associated remote host
6713 address. When Resent- header lines are present, this applies to the Resent-
6714 lines rather than the non-Resent- lines.
6716 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6717 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6719 58. Messages for configuration errors now include the name of the main
6720 configuration file - useful now that there may be more than one file in a
6721 list (.included file names were always shown).
6723 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6724 for those rare installations that do not start the daemon as root or run it
6725 setuid root. I've cut out the call to initgroups() if the daemon is not
6728 60. The Exim user and group can now be bound into the binary as text strings
6729 that are looked up at the start of Exim's processing.
6731 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6733 62. Added $mailstore_basename variable.
6735 63. Installed patch to sieve.c from Michael Haardt.
6737 64. When Exim failed to open the panic log after failing to open the main log,
6738 the original message it was trying to log was written to stderr and debug
6739 output, but if they were not available (the usual case in production), it
6740 was lost. Now it is written to syslog before the two lines that record the
6741 failures to open the logs.
6743 65. Users' Exim filters run in subprocesses under the user's uid. It is
6744 possible for a "deliver" command or an alias in a "personal" command to
6745 provoke an address rewrite. If logging of address rewriting is configured,
6746 this fails because the process is not running as root or exim. There may be
6747 a better way of dealing with this, but for the moment (because 4.30 needs
6748 to be released), I have disabled address rewrite logging when running a
6749 filter in a non-root, non-exim process.
6755 1. The buildconfig auxiliary program wasn't quoting the value set for
6756 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6757 not defined. This bug was masked in 4.22 by the effect that was fixed in
6760 2. Some messages that were rejected after a message id was allocated were
6761 shown as "incomplete" by exigrep. It no longer does this for messages that
6762 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6764 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6765 have allow_domain_literals set, the ID did not get logged in the <= line.
6766 Domain literals are now always recognized in Message-ID: header lines.
6768 4. The first argument for a ${extract expansion item is the key name or field
6769 number. Leading and trailing spaces in this item were not being ignored,
6770 causing some misleading effects.
6772 5. When deliver_drop_privilege was set, single queue runner processes started
6773 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6774 same command in the process it spins off) were not dropping privilege.
6776 6. When the daemon running as "exim" started a queue runner, it always
6777 re-executed Exim in the spun-off process. This is a waste of effort when
6778 deliver_drop_privilege is set. The new process now just calls the
6779 queue-runner function directly.
6785 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6788 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6789 ignored. Though the use of -oP was forcing the writing of a pid file, it
6790 was always written to the default place.
6792 3. If the message "no IP address found for host xxxx" is generated during
6793 incoming verification, it is now followed by identification of the incoming
6794 connection (so you can more easily find what provoked it).
6796 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6798 5. Added some features to "harden" Exim a bit more against certain attacks:
6800 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6801 be put in Local/Makefile. This is like the never_users runtime option,
6802 but it cannot be overridden. The default setting is "root".
6804 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6805 prefix string with which any file named in a -C command line option
6808 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6809 is retained for -C and -D only if the caller of Exim is root. Without
6810 it, the exim user may also use -C and -D and retain privilege.
6812 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6813 command line option is disabled.
6815 6. Macro names set by the -D option must start with an upper case letter, just
6816 like macro names defined in the configuration file.
6818 7. Added "dereference=" facility to LDAP.
6820 8. Two instances of the typo "uknown" in the source files are fixed.
6822 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6823 the Configure-Makefile script screwed up while processing it.
6825 10. Incorporated PCRE 4.4.
6827 11. The SMTP synchronization check was not operating right at the start of an
6828 SMTP session. For example, it could not catch a HELO sent before the client
6829 waited for the greeting. There is now a check for outstanding input at the
6830 point when the greeting is written. Because of the duplex, asynchronous
6831 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6832 way, but not yet received, when the check is performed.
6834 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6835 on TCP/IP sockets, because this apparently causes some broken clients to
6838 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6839 unchanged) from the Cygwin maintainer.
6841 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6842 was supported instead of testing for mbx. Effectively a typo.
6844 15. The spa authenticator server code was not checking that the input it
6845 received was valid base64.
6847 16. The debug output line for the "set" modifier in ACLs was not showing the
6848 name of the variable that was being set.
6850 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6852 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6853 lookup on its own. Something else was needed to trigger the lookup. For
6854 example, a match in host_lookup or the need for a host name in a host list.
6855 Now, if $sender_host_name is referenced and the host name has not yet been
6856 looked up, a lookup is performed. If the lookup fails, the variable remains
6857 empty, and $host_lookup_failed is set to "1".
6859 19. Added "eqi" as a case-independent comparison operator.
6861 20. The saslauthd authentication condition could segfault if neither service
6862 nor realm was specified.
6864 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6865 error message that was logged was misleading, and incoming SMTP
6866 connections were dropped. The message is now more accurate, and temporary
6867 errors are given to SMTP connections.
6869 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6870 (except RSET) with a 421 error, until QUIT is received. However, it was
6871 failing to send a response to QUIT.
6873 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6874 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6875 ACL is now run after the helo_try_verify_hosts code.
6877 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6878 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6879 case-independent, so other case variants are also recognized). Apparently
6880 some systems use these upper case variants.
6882 25. If more than two messages were waiting for the same host, and a transport
6883 filter was specified for the transport, Exim sent two messages over the
6884 same TCP/IP connection, and then failed with "socket operation on non-
6885 socket" when it tried to send the third.
6887 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6889 27. The extern definition of crypt16() in expand.c was not being excluded when
6890 the OS had its own crypt16() function.
6892 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6893 as a preferred synonym for return_size_limit, both as an option and as an
6896 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6898 30. Changed the default configuration ACL to relax the local part checking rule
6899 for addresses that are not in any local domains. For these addresses,
6900 slashes and pipe symbols are allowed within local parts, but the sequence
6901 /../ is explicitly forbidden.
6903 31. SPA server authentication was not clearing the challenge buffer before
6906 32. log_message in a "warn" ACL statement was writing to the reject log as
6907 well as to the main log, which contradicts the documentation and doesn't
6908 seem right (because no rejection is happening). So I have stopped it.
6910 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6911 However, I am unable to do any testing of this.
6913 34. Fixed an infelicity in the appendfile transport. When checking directories
6914 for a mailbox, to see if any needed to be created, it was accidentally
6915 using path names with one or more superfluous leading slashes; tracing
6916 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6918 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6919 contents are added to the log line that is written for every discarded
6920 recipient. (Previously a log_message setting was ignored.)
6922 36. The ${quote: operator now quotes the string if it is empty.
6924 37. The install script runs exim in order to find its version number. If for
6925 some reason other than non-existence or emptiness, which it checks, it
6926 could not run './exim', it was installing it with an empty version number,
6927 i.e. as "exim-". This error state is now caught, and the installation is
6930 38. An argument was missing from the function that creates an error message
6931 when Exim fails to connect to the socket for saslauthd authentication.
6932 This could cause Exim to crash, or give a corrupted message.
6934 39. Added isip, isip4, and isip6 to ${if conditions.
6936 40. The ACL variables $acl_xx are now saved with the message, and can be
6937 accessed later in routers, transports, and filters.
6939 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6940 strings in the file are not string-expanded.
6942 42. If a MAIL command specified a SIZE value that was too large to fit into an
6943 int variable, the check against message_size_limit failed. Such values are
6944 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6945 day this will have to be increased, but I don't think I want to be around
6946 when emails are that large.
6953 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6954 iconv() is not standard in FreeBSD.
6956 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6957 IPv6 enabled. The observed symptom was a segmentation fault on return from
6958 the function os_common_find_running_interfaces() in src/os.c.
6960 3. In the check_special_case() function in daemon.c I had used "errno" as an
6961 argument name, which causes warnings on some systems. This was basically a
6962 typo, since it was named "eno" in the comments!
6964 4. The code that waits for the clock to tick (at a resolution of some fraction
6965 of a second) so as to ensure message-id uniqueness was always waiting for
6966 at least one whole tick, when it could have waited for less. [This is
6967 almost certainly not relevant at current processor speeds, where it is
6968 unlikely to ever wait at all. But we try to future-proof.]
6970 5. The function that sleeps for a time interval that includes fractions of a
6971 second contained a race. It did not block SIGALRM between setting the
6972 timer, and suspending (a couple of lines later). If the interval was short
6973 and the sigsuspend() was delayed until after it had expired, the suspension
6974 never ended. On busy systems this could lead to processes getting stuck for
6977 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6978 process, before it forks any delivery processes. The open lookup caching
6979 mechanism meant that the open file or database connection was passed into
6980 the delivery process. The problem was that delivery processes always tidy
6981 up cached lookup data. This could cause a problem for the next delivery
6982 process started by the queue runner, because the external queue runner
6983 process does not know about the closure. So the next delivery process
6984 still has data in the lookup cache. In the case of a file lookup, there was
6985 no problem because closing a file descriptor in a subprocess doesn't affect
6986 the parent. However, if the lookup was caching a connection to a database,
6987 the connection was closed, and the second delivery process was likely to
6988 see errors such as "PGSQL: query failed: server closed the connection
6989 unexpectedly". The problem has been fixed by closing all cached lookups
6990 in a queue runner before running a delivery process.
6992 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6993 seem to have the "const" qualifier which it has on other OS. I've
6996 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6997 *of the same type* (client or server) with the same public name that an
6998 error should be diagnosed.
7000 9. When Exim looked up a host name for an IP address, but failed to find the
7001 original IP address when looking up the host name (a safety check), it
7002 output the message "<ip address> does not match any IP for NULL", which was
7003 confusing, to say the least. The bug was that the host name should have
7004 appeared instead of "NULL".
7006 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7007 user that is built into the binary, and the -C or -D options is used, root
7008 privilege is dropped before the configuration file is read. In addition,
7009 logging is switched to stderr instead of the normal log files. If the
7010 configuration then re-defines the Exim user, the unprivileged environment
7011 is probably not what is expected, so Exim logs a panic warning message (but
7014 However, if deliver_drop_privilege is set, the unprivileged state may well
7015 be exactly what is intended, so the warning has been cut out in that case,
7016 and Exim is allowed to try to write to its normal log files.
7022 1. smtp_return_error_details was not giving details for temporary sender
7023 or receiver verification errors.
7025 2. Diagnose a configuration error if two authenticators have the same public
7028 3. Exim used not to create the message log file for a message until the first
7029 delivery attempt. This could be confusing when incoming messages were held
7030 for policy or load reasons. The message log file is now created at the time
7031 the message is received, and an initial "Received" line is written to it.
7033 4. The automatically generated man page for command line options had a minor
7034 bug that caused no ill effects; however, a more serious problem was that
7035 the procedure for building the man page automatically didn't always
7036 operate. Consequently, release 4.20 contains an out-of-date version. This
7037 shouldn't happen again.
7039 5. When building Exim with embedded Perl support, the script that builds the
7040 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7041 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7043 6. The freeze_tell option was not being used for messages that were frozen on
7044 arrival, either by an ACL or by local_scan().
7046 7. Added the smtp_incomplete_transaction log selector.
7048 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7049 was accepting AUTH without a new EHLO.
7051 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7052 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7055 10. Logging of TCP/IP connections (when configured) now happens in the main
7056 daemon process instead of the child process, so that the TCP/IP connection
7057 count is more accurate (but it can never be perfect).
7059 11. The use of "drop" in a nested ACL was not being handled correctly in the
7060 outer ACL. Now, if condition failure induced by the nested "drop" causes
7061 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7062 or "require"), the connection is dropped.
7064 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7065 that yield "discard" can now be used with an "accept" or a "discard" verb,
7066 but an error is generated for any others (because I can't see a useful way
7067 to define what should happen).
7069 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7070 are now processed in the same way as lines in the Exim configuration file.
7071 In particular, continuation lines are supported.
7073 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7075 15. Added -ti meaning -t -i.
7077 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7078 domains, and warn by logging if others are found.
7080 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7081 returned from GIFCONF when Exim is trying to find the list of interfaces on
7082 a host. The code in os.c has been modified to copy each ifreq to an aligned
7083 structure in all cases.
7085 Also, in some cases, the returned ifreq's were being copied to a 'struct
7086 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7087 means the last couple of bytes of an IPv6 address could be chopped if the
7088 ifreq contained only a normal sockaddr (14 bytes storage).
7090 18. Named domain lists were not supported in the hosts_treat_as_local option.
7091 An entry such as +xxxx was not recognized, and was treated as a literal
7094 19. Ensure that header lines added by a DATA ACL are included in the reject log
7095 if the ACL subsequently rejects the message.
7097 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7098 MD5 (which is deprecated).
7100 21. When testing a filter file using -bf, Exim was writing a message when it
7101 took the sender from a "From " line in the message, but it was not doing so
7102 when it took $return_path from a Return-Path: header line. It now does.
7104 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7105 with a valid header line field name (a series of printing characters
7106 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7108 23. Changed "disc" in the source to "disk" to conform to the documentation and
7109 the book and for uniformity.
7111 24. Ignore Sendmail's -Ooption=value command line item.
7113 25. When execve() failed while trying to run a command in a pipe transport,
7114 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7115 could be confused with a return value of 69 from the command itself. This
7116 has been changed to 127, the value the shell returns if it is asked to run
7117 a non-existent command. The wording for the related log line suggests a
7118 non-existent command as the problem.
7120 26. If received_header_text expands to an empty string, do not add a Received:
7121 header line to the message. (Well, it adds a token one on the spool, but
7122 marks it "old" so that it doesn't get used or transmitted.)
7124 27. Installed eximstats 1.28 (addition of -nt option).
7126 28. There was no check for failure on the call to getsockname() in the daemon
7127 code. This can fail if there is a shortage of resources on the system, with
7128 ENOMEM, for example. A temporary error is now given on failure.
7130 29. Contrary to the C standard, it seems that in some environments, the
7131 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7132 program. Exim now does this explicitly; it affects the formatting of
7133 timestamps using strftime().
7135 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7136 complaints. I've now initialized all the variables, to avoid this.
7138 32. Header lines added by a system filter were not being "seen" during
7139 transport-time rewrites.
7141 33. The info_callback() function passed to OpenSSL is set up with type void
7142 (*)(SSL *, int, int), as described somewhere. However, when calling the
7143 function (actually a macro) that sets it up, the type void(*)() is
7144 expected. I've put in a cast to prevent warnings from picky compilers.
7146 34. If a DNS black list lookup found a CNAME record, but there were no A
7147 records associated with the domain it pointed at, Exim crashed.
7149 35. If a DNS black list lookup returned more than one A record, Exim ignored
7150 all but the first. It now scans all returned addresses if a particular IP
7151 value is being sought. In this situation, the contents of the
7152 $dnslist_value variable are a list of all the addresses, separated by a
7155 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7156 to accept a host name and all its aliases if the forward lookup for any of
7157 them yielded the IP address of the incoming connection. Now it accepts only
7158 those names whose forward lookup yields the correct IP address. Any other
7159 names are discarded. This closes a loophole whereby a rogue DNS
7160 administrator could create reverse DNS records to break through a
7161 wildcarded host restriction in an ACL.
7163 37. If a user filter or a system filter that ran in a subprocess used any of
7164 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7165 the wrong values were passed to the pipe command ($thisaddress had the
7166 value of $0, $0 had the value of $1, etc). This bug was introduced by
7167 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7169 38. Improved the line breaking for long SMTP error messages from ACLs.
7170 Previously, if there was no break point between 40 and 75 characters, Exim
7171 left the rest of the message alone. Two changes have been made: (a) I've
7172 reduced the minimum length to 35 characters; (b) if it can't find a break
7173 point between 35 and 75 characters, it looks ahead and uses the first one
7174 that it finds. This may give the occasional overlong line, but at least the
7175 remaining text gets split now.
7177 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7178 file descriptors might be low, and that setting 1000 would always raise it.
7179 It turns out that in some environments, the limit is already over 1000 and
7180 that lowering it causes trouble. So now Exim takes care not to decrease it.
7182 40. When delivering a message, the value of $return_path is set to $sender_
7183 address at the start of routing (routers may change the value). By an
7184 oversight, this default was not being set up when an address was tested by
7185 -bt or -bv, which affected the outcome if any router or filter referred to
7188 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7189 log only when "message" or "log_message" are set. However, if one of the
7190 conditions was an address verification, or a call to a nested ACL, the
7191 messages generated by the underlying test were being passed through. This
7192 no longer happens. The underlying message is available in $acl_verify_
7193 message for both "message" and "log_message" expansions, so it can be
7194 passed through if needed.
7196 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7197 new expansion $bh_ to give the encoded byte string without charset
7198 translation. Translation happens only if iconv() is available; HAVE_ICONV
7199 indicates this at build time. HEADERS_CHARSET gives the charset to
7200 translate to; headers_charset can change it in the configuration, and
7201 "headers charset" can change it in an individual filter file.
7203 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7204 that creates RFC 2047 encoded "words" labels them as that charset instead
7205 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7206 expansion operator; (ii) when Exim creates a From: line for a local
7207 message; (iii) when a header line is rewritten to include a "phrase" part.
7209 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7210 buggy, causing it to skip the first lines of messages whose message ID
7211 ended in 'D'. This would not have bitten before Exim release 4.14, because
7212 message IDs were unlikely to end in 'D' before then. The effect was to have
7213 incorrect size information for certain domains.
7215 45. #include "config.h" was missing at the start of the crypt16.c module. This
7216 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7219 46. If there was a timeout during a "random" callout check, Exim treated it as
7220 a failure of the random address, and carried on sending RSET and the real
7221 address. If the delay was just some slowness somewhere, the response to the
7222 original RCPT would be taken as a response to RSET and so on, causing
7223 mayhem of various kinds.
7225 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7226 when I implemented it. It didn't allow for the fact that some option values
7227 may legitimately be negative (e.g. size_addition), and it didn't even do
7228 the right test for positive values.
7230 48. Domain names in DNS records are case-independent. Exim always looks them up
7231 in lower case. Some resolvers return domain names in exactly the case they
7232 appear in the zone file, that is, they may contain uppercase letters. Not
7233 all resolvers do this - some return always lower case. Exim was treating a
7234 change of case by a resolver as a change of domain, similar to a widening
7235 of a domain abbreviation. This triggered its re-routing code and so it was
7236 trying to route what was effectively the same domain again. This normally
7237 caused routing to fail (because the router wouldn't handle the domain
7238 twice). Now Exim checks for this case specially, and just changes the
7239 casing of the domain that it ultimately uses when it transmits the message
7242 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7245 50. If a filter generated a file delivery with a non-absolute name (possible if
7246 no home directory exists for the router), the forbid_file option was not
7249 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7250 the existing equality matching.
7252 52. Exim was using ints instead of ino_t variables in some places where it was
7253 dealing with inode numbers.
7255 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7256 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7257 called TMPDIR, and if it finds it is different, it changes its value.
7259 54. The smtp_printf() function is now made available to local_scan() so
7260 additional output lines can be written before returning. There is also an
7261 smtp_fflush() function to enable the detection of a dropped connection.
7262 The variables smtp_input and smtp_batched_input are exported to
7265 55. Changed the default runtime configuration: the message "Unknown user"
7266 has been removed from the ACL, and instead placed on the localuser router,
7267 using the cannot_route_message feature. This means that any verification
7268 failures that generate their own messages won't get overridden. Similarly,
7269 the "Unrouteable address" message that was in the ACL for unverifiable
7270 relay addresses has also been removed.
7272 56. Added hosts_avoid_esmtp to the smtp transport.
7274 57. The exicyclog script was not checking for the esoteric option
7275 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7276 will work only if exicyclog is run under the appropriate euid.
7278 58. Following a discussion on the list, the rules by which Exim recognises line
7279 endings on incoming messages have been changed. The -dropcr and drop_cr
7280 options are now no-ops, retained only for backwards compatibility. The
7281 following line terminators are recognized: LF CRLF CR. However, special
7282 processing applies to CR:
7284 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7285 nor a local message in the state where . is a terminator.
7287 (ii) If a bare CR is encountered in a header line, an extra space is added
7288 after the line terminator so as not to end the header. The reasoning
7289 behind this is that bare CRs in header lines are most likely either
7290 to be mistakes, or people trying to play silly games.
7292 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7293 was being incorrectly given as 18 bytes larger than it should have been.
7294 This is a VOB (very old bug).
7296 60. This may never have affected anything current, but just in case it has:
7297 When the local host is found other than at the start of a list of hosts,
7298 the local host, those with the same MX, and any that follow, are discarded.
7299 When the list in question was part of a longer list of hosts, the following
7300 hosts (not currently being processed) were also being discarded. This no
7301 longer happens. I'm not sure if this situation could ever has previously
7304 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7307 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7308 header. This is something that is recommended in a new Internet Draft, and
7309 is something that is documented as being done by Sendmail. There are two
7310 possible values. For messages generated by the autoreply transport, Exim
7313 Auto-Submitted: auto-replied
7315 whereas for all other generated messages (e.g. bounces) it adds
7317 Auto-Submitted: auto-generated
7319 63. The "personal" condition in filters now includes a test for the
7320 Auto-Submitted: header. If it contains the string "auto-" the message it
7321 not considered personal.
7323 64. Added rcpt_include_affixes as a generic transport option.
7325 65. Added queue_only_override (default true).
7327 66. Added the syslog_duplication option.
7329 67. If what should have been the first header line of a message consisted of
7330 a space followed by a colon, Exim was mis-interpreting it as a header line.
7331 It isn't of course - it is syntactically invalid and should therefore be
7332 treated as the start of the message body. The misbehaviour could have
7333 caused a number of strange effects, including loss of data in subsequent
7334 header lines, and spool format errors.
7336 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7337 client host had authenticated. This control can now be exercised by an ACL
7338 for more flexibility.
7340 69. By default, callouts do not happen when testing with -bh. There is now a
7341 variant, -bhc, which does actually run the callout code, including
7342 consulting and updating the callout cache.
7344 70. Added support for saslauthd authentication, courtesy of Alexander
7347 71. If statvfs() failed on the spool or log directories while checking their
7348 size for availability, Exim confusingly gave the error "space shortage".
7349 Furthermore, in debugging mode it crashed with a floating point exception.
7350 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7351 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7352 serious problem, Exim now writes to the main and panic logs when this
7353 happens, with details of the failure. It then refuses to accept the
7354 incoming message, giving the message "spool directory problem" or "log
7355 directory problem" with a 421 code for SMTP messages.
7357 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7358 0, 1, and 2 exist, because some OS complain for execs without them (see
7359 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7360 descriptors. However, the code omitted to check that the open succeeded,
7361 causing mysterious errors if for some reason the permissions on /dev/null
7362 got screwed. Now Exim writes a message to the main and panic logs, and
7363 bombs out if it can't open /dev/null.
7365 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7366 interact so that it is all more flexible. It is supposed to remain
7367 backwards compatible. Also added extra_local_interfaces.
7369 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7370 to bomb out with an assertion failure - to the client this appears as a
7371 connection drop. This problem occurs in the part of the code that was taken
7372 from the Samba project. Fortunately, the assertion is in a very simple
7373 function, so I have fixed this by reproducing the function inline in the
7374 one place where it is called, and arranging for authentication to fail
7375 instead of killing the process with assert().
7377 75. The SPA client code was not working when the server requested OEM rather
7378 than Unicode encoding.
7380 76. Added code to make require_files with a specific uid setting more usable in
7381 the case where statting the file as root fails - usually a non-root-mounted
7382 NFS file system. When this happens and the failure is EACCES, Exim now
7383 forks a subprocess and does the per-uid checking as the relevant uid.
7385 77. Added process_log_path.
7387 78. If log_file_path was not explicitly set, a setting of check_log_space or
7388 check_log_inodes was ignored.
7390 79. If a space check for the spool or log partitions fails, the incident is now
7391 logged. Of course, in the latter case the data may get lost...
7393 80. Added the %p formatting code to string_format() so that it can be used to
7394 print addresses in debug_print(). Adjusted all the address printing in the
7395 debugging in store.c to use %p rather than %d.
7397 81. There was a concern that a line of code in smtp_in.c could overflow a
7398 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7399 initially expressed, the concern was not well-founded, because trailing
7400 spaces are removed early. However, if the trailing spaces were followed by
7401 a NULL, they did not get removed, so the overflow was possible. Two fixes
7404 (a) I re-wrote the offending code in a cleaner fashion.
7405 (b) If an incoming SMTP command contains a NULL character, it is rejected
7408 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7409 runs initgroups(), so that if the Exim user is in any additional groups,
7410 they will be used during message reception.
7416 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob