Postfix stable release 2.3 patch09 contains back-ported fixes that
have also been made available in the stable Postfix 2.4 release.
See below for a detailed history.
Available from the mirror sites listed at http://www.postfix.org/
2573 Apr 23 20:26 postfix-2.3-patch09.gz
452020 Apr 23 20:08 postfix-2.3.9.HISTORY
36337 Feb 2 11:11 postfix-2.3.9.RELEASE_NOTES
2788423 Apr 23 20:18 postfix-2.3.9.tar.gz
280 Apr 23 20:18 postfix-2.3.9.tar.gz.sig
and the web page at ftp://ftp.porcupine.org/mirrors/postfix-release/index.html
Workaround: on some FreeBSD versions, accept(2) can fail
with a bogus EINVAL error. We now allow accept(2) to fail
for a limited number of times before terminating the process.
Files: master/single_server.c, master/multi_server.c.
Back-ported from Postfix 2.4.
Bugfix (introduced with Postfix 2.3 Milter support): postdrop
reported "illegal seek" instead of "file too large". File:
postdrop/postdrop.c. Back-ported from Postfix 2.4.
Bugfix (introduced Postfix 2.3): segfault with HOLD action
in access/header_checks/body_checks on 64-bit platforms.
File: cleanup/cleanup_api.c. Back-ported from Postfix 2.4.
Workaround: on (Linux) platforms that cripple signal handlers
with deadlock, "postfix stop" forcefully stops all processes
in the master's process group. Files: conf/postfix-script,
master/master_sig.c. Back-ported from Postfix 2.4.