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8 <title> Postfix stable release
2.6.0 </title>
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16 <h1> Postfix stable release
2.6.0 </h1>
19 An on-line version of this announcement is available at
20 <a href=
"http://www.postfix.org/announcements/postfix-2.6.0.html">http://www.postfix.org/announcements/postfix-
2.6.0.html
</a>
24 Postfix stable release
2.6.0 is available. After Postfix was declared
25 "complete" with version
2.3, the focus has moved towards improving
26 the code/documentation, and updating it for changing environments.
32 Multi-instance support introduces a new
<a href=
"../postmulti.1.html">postmulti(
1)
</a> command to
33 create/add/remove/etc. additional Postfix instances. The familiar
34 "postfix start" etc. commands now automatically start multiple
35 Postfix instances. The good news: nothing changes when you use
36 only one Postfix instance. See
<a href=
"../MULTI_INSTANCE_README.html">MULTI_INSTANCE_README
</a> for details.
40 Multi-instance support required that some files be moved from
41 the non-shared $
<a href=
"../postconf.5.html#config_directory">config_directory
</a> to the shared $
<a href=
"../postconf.5.html#daemon_directory">daemon_directory
</a>.
42 The affected files are postfix-script, postfix-files and post-install.
46 TLS (SSL) support was updated for elliptic curve encryption. This
47 requires OpenSSL version
0.9.9 or later. The SMTP client no longer
48 uses the SSLv2 protocol by default. See
<a href=
"../TLS_README.html">TLS_README
</a> for details.
52 The Milter client now supports all Sendmail
8.14 Milter requests,
53 including requests for rejected recipient addresses, and requests
54 to replace the envelope sender address. See
<a href=
"../MILTER_README.html">MILTER_README
</a> for
59 Postfix no longer adds (Resent-) From:, Date:, Message-ID: or To:
60 headers to email messages with
"remote" origins (these are origins
61 that don't match $
<a href=
"../postconf.5.html#local_header_rewrite_clients">local_header_rewrite_clients
</a>). Adding such
62 headers breaks DKIM signatures that explicitly cover non-present
63 headers. For compatibility with existing logfile processing
64 software, Postfix will log ``message-id=<
>'' for email messages
65 that have no Message-Id header.
69 Stress-adaptive behavior is now enabled by default. This allows
70 the Postfix SMTP server to temporarily reduce time limits and
71 error-count limits under conditions of overload, such as a malware
72 attack or backscatter flood. See
<a href=
"../STRESS_README.html">STRESS_README
</a> for details.
78 No functionality has been removed, but it is a good idea to review
79 the RELEASE_NOTES file for the usual minor incompatibilities or
84 You can find Postfix version
2.6.0 at the mirrors listed at
85 <a href=
"http://www.postfix.org/">http://www.postfix.org/
</a>
89 The same code is also available as Postfix snapshot
2.7-
20090511.
90 Updated versions of Postfix version
2.5,
2.4 and perhaps
2.3 will
91 be released with the same fixes that were already included with
92 Postfix versions
2.6 and
2.7.