postfix-master/announcements/postfix-2.6.0.html

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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>
  17
  18 <p>
  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>
  21 </p>
  22
  23 <p>
  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.
  27 </p>
  28
  29 <ul>
  30
  31 <li> <p>
  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.
  37 </p>
  38
  39 <li> <p>
  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.
  43 </p>
  44
  45 <li> <p>
  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.
  49 </p>
  50
  51 <li> <p>
  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
  55   details.
  56 </p>
  57
  58 <li> <p>
  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.
  66 </p>
  67
  68 <li> <p>
  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.
  73 </p>
  74
  75 </ul>
  76
  77 <p>
  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
  80 limitations.
  81 </p>
  82
  83 <p>
  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>
  86 </p>
  87
  88 <p>
  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.
  93 </p>
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