Postfix 2.6 stable release candidate 3 is available. If this has
no problems, then Postfix 2.6.0 will happen soon. The same code is
also available as Postfix 2.7 experimental release 20090428.
Wietse
TLS changes since release candidate 2:
======================================
The Postfix SMTP client(!) no longer tries to use the obsolete SSLv2
protocol by default, as this may prevent the use of modern SSL
features. Lack of SSLv2 support should never be a problem, since
SSLv3 was defined in 1996, and TLSv1 in 2006, but you can undo the
change by specifying empty main.cf values for smtp_tls_protocols
and lmtp_tls_protocols. The Postfix SMTP server maintains SSLv2
support for backwards compatibility with ancient clients.
MILTER changes since release candidate 2:
=========================================
The following improvements have been made to the Milter implementation:
- Improved compatibility of the {mail_addr} and {rcpt_addr} macros.
- Support for the {mail_host}, {mail_mailer}, {rcpt_host} and
{rcpt_mailer} macros.
- Milter applications can now request rejected recipients with the
SMFIP_RCPT_REJ feature. Rejected recipients are reported with
{rcpt_mailer} = "error", {rcpt_host} = enhanced status code, and
{rcpt_addr} = descriptive text. This feature requires "milter_protocol
= 6" or higher (default as of Postfix 2.6).
- Milters can now replace the envelope sender address with the
SMFIR_CHGFROM request, and can add recipients with SMFIR_ADDRCPT_PAR.
These implementations currently ignore ESMTP command parameters
with a warning message as follows:
postfix/cleanup[40629]: warning: 100B22B3293: cleanup_chg_from:
ignoring ESMTP arguments "whatever"
------------
The default milter_protocol setting is increased from 2 to 6; this
enables all available features up to and including Sendmail 8.14.0.
The new milter_protocol setting may break compatibility with older
Milter libraries or applications, and may cause Postfix to log
warning messages such as:
warning: milter inet:host:port: can't read packet header: Unknown error : 0
warning: milter inet:host:port: can't read packet header: Success
warning: milter inet:host:port: can't read SMFIC_DATA reply
packet header: No such file or directory
To restore compatibility, specify "milter_protocol = 2" in main.cf.
