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Postfix stable/legacy release 2.7.2, 2.6.8, 2.5.11, and 2.4.15 Wietse Venema Tue Nov 23 16:00:19 2010

An on-line version of this announcement will be available at
http://www.postfix.org/announcements/postfix-2.7.2.html

The stable release Postfix 2.7.2 addresses the defects described
below.  These defects are also addressed in the legacy releases
that are still maintained.

Note: Postfix 2.3 and earlier are no longer updated. Support for
Postfix 2.4 will end in 2011.

Defects fixed with Postfix 2.7.2, 2.6.8, 2.5.11, and 2.4.15:

- Postfix no longer automatically appends the system default CA
  (certificate authority) certificates, when it reads the CA
  certificates specified with {smtp, lmtp, smtpd}_tls_CAfile or
  with {smtp, lmtp, smtpd}_tls_CApath.  This prevents third-party
  certificates from getting mail relay permission with the
  permit_tls_all_clientcerts feature.  Unfortunately, this change
  may cause compatibility problems with configurations that rely
  on certificate verification for other purposes.  To get the old
  behavior, specify "tls_append_default_CA = yes".

- A prior fix for compatibility with Postfix < 2.3 was incomplete.
  When pipe-to-command delivery fails with a signal, mail is now
  correctly deferred, instead of being returned to sender.

- Poor smtpd_proxy_filter TCP performance over loopback (127.0.0.1)
  connections was fixed by adapting the output buffer size to the
  MTU.

- The SMTP server no longer applies the reject_rhsbl_helo feature
  to non-domain forms such as network addresses.  This would cause
  false positives with dbl.spamhaus.org.

- The Postfix SMTP server failed to deliver a "421" response and
  hang up the connection after Milter error.  Instead, the server
  delivered a "503 Access denied" response and left the connection
  open, due to some Postfix 1.1 workaround for RFC 2821.

Defects fixed with Postfix 2.7.2:

- The milter_header_checks parser failed to enable any of the actions
  that have no effect on message delivery (warn, replace, prepend,
  ignore, dunno, and ok).

You can find the updated Postfix versions at the mirrors listed at
http://www.postfix.org/

        Wietse