- Elliptic curve negotiation with OpenSSL >= 1.0.2. This changes the
default smtpd_tls_eecdh_grade setting to "auto", and introduces a
new parameter tls_eecdh_auto_curves with the names of curves that may
be negotiated.
- Stored-procedure support for MySQL databases.
- Cidr: table support for if/endif and negation (by prepending ! to a
pattern), just like regexp: and pcre: tables. See the cidr_table(5)
manpage for details.
- The postmap command and the inline: and texthash: maps now support
spaces in left-hand field of lookup table source text. Use double
quotes (") around a left-hand field that contains spaces, and use
backslash (\) to protect quotes in a left-hand field.
- Support for per-client Milter configuration (smtpd_milter_maps) that
overrides the main.cf smtpd_milters setting, and that has the same
syntax. A lookup result of "DISABLE" turns off Milter support for that
client.
- The local SMTP server IP address and port are available in the
policy delegation protocol (attribute names: server_address,
server_port), in the Milter protocol (macro names: {daemon_addr},
{daemon_port}), and in the XCLIENT protocol (attribute names:
DESTADDR, DESTPORT).
- For safety reasons, the Postfix sendmail -C option must specify an
authorized directory: the default configuration directory, a
directory that is listed in the default main.cf file with
alternate_config_directories or multi_instance_directories, otherwise
the command must be invoked with root privileges. This mitigates a
recurring "jail break" problem with the PHP mail() function.
- "PASS" and "STRIP" actions in header/body_checks. "STRIP" is similar
to "IGNORE" but also logs the action, and "PASS" disables header,
body, and Milter inspection for the remainder of the message content.
- The collate.pl script by Viktor Dukhovni for grouping Postfix
logfile records into "sessions" based on queue ID and process ID
information, in the auxiliary/collate directory of the Postfix source
tree.
Disabled or removed behavior:
- SMTPUTF8 support: Postfix 3.2 disables the 'transitional'
compatibility between the IDNA2003 and IDNA2008 standards for
internationalized domain names (domain names beyond the limits of
US-ASCII). This makes Postfix behavior consistent with contemporary
web browsers.
- Postfix 3.2 removes tentative features that were implemented before
the DANE spec was finalized: support for certificate usage
PKIX-EE(1), the ability to disable digest agility, and the ability to
disable support for "TLSA 2 [01] [12]" records that specify the digest
of a trust anchor.
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