-INTERNATIONAL
-------------------------------------------------------------
-SMTPUTF8
-Internationalised mail name handling.
-RFCs 6530, 6533, 5890
-
-Compile with EXPERIMENTAL_INTERNATIONAL and libidn.
-
-New main config option smtputf8_advertise_hosts, default '*',
-a host list. If this matches the sending host and
-accept_8bitmime is true (the default) then the ESMTP option
-SMTPUTF8 will be advertised.
-
-If the sender specifies the SMTPUTF8 option on a MAIL command
-international handling for the message is enabled and
-the expansion variable $message_smtputf8 will have value TRUE.
-
-The option allow_utf8_domains is set to true for this
-message. All DNS lookups are converted to a-label form
-whatever the setting of allow_utf8_domains.
-
-Both localparts and domain are maintained as the original
-utf8 form internally; any matching or regex use will
-require appropriate care. Filenames created, eg. by
-the appendfile transport, will have utf8 name.
-
-Helo names sent by the smtp transport will have any utf8
-components expanded to a-label form.
-
-Any certificate name checks will be done using the a-label
-form of the name.
-
-Log lines and Received-by: header lines will aquire a "utf8"
-prefix on the protocol element, eg. utf8esmtp.
-
-New expansion operators:
- ${utf8_domain_to_alabel:str}
- ${utf8_domain_from_alabel:str}
- ${utf8_localpart_to_alabel:str}
- ${utf8_localpart_from_alabel:str}
-
-New "control = utf8_downconvert" ACL modifier,
-sets a flag requiring that addresses are converted to
-a-label form before smtp delivery, for use in a
-Message Submission Agent context. Can also be
-phrased as "control = utf8_downconvert/1" and is
-mandatory. The flag defaults to zero and can be cleared
-by "control = utf8_downconvert/0". The value "-1"
-may also be used, to use a-label for only if the
-destination host does not support SMTPUTF8.
-
-If mua_wrapper is set, the utf8_downconvert control
-defaults to -1 (convert if needed).
-
-
-There is no explicit support for VRFY and EXPN.
-Configurations supporting these should inspect
-$smtp_command_argument for an SMTPUTF8 argument.
-
-There is no support for LMTP on Unix sockets.
-Using the "lmtp" protocol option on an smtp transport,
-for LMTP over TCP, should work as expected.
-
-Known issues:
- - DSN unitext handling is not present
- - no provision for converting logging from or to UTF-8
-
-----
-IMAP folder names
-
-New expansion operator:
-
-${imapfolder {<string>} {<sep>} {<specials>}}
-
-The string is converted from the charset specified by the headers charset
-command (in a filter file) or headers_charset global option, to the
-modified UTF-7 encoding specified by RFC 2060, with the following
-exception: All occurences of <sep> (which has to be a single character)
-are replaced with periods ("."), and all periods and slashes that aren't
-<sep> and are not in the <specials> string are BASE64 encoded.
-
-The third argument can be omitted, defaulting to an empty string.
-The second argument can be omitted, defaulting to "/".
-
-This is the encoding used by Courier for Maildir names on disk, and followed
-by many other IMAP servers.
-
- Example 1: ${imapfolder {Foo/Bar}} yields "Foo.Bar".
- Example 2: ${imapfolder {Foo/Bar}{.}{/}} yields "Foo&AC8-Bar".
- Example 3: ${imapfolder {Räksmörgås}} yields "R&AOQ-ksm&APY-rg&AOU-s".
-
-Note that the source charset setting is vital, and also that characters
-must be representable in UTF-16.
-
-
-
DSN extra information
---------------------
If compiled with EXPERIMENTAL_DSN_INFO extra information will be added
git://git.exim.org / users / jgh / exim.git / blobdiff