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+<link rel="first" href="mailman-install.html" title='GNU mailman - installation Manual' />
+<link rel='last' href='about.html' title='About this document...' />
+<link rel='help' href='about.html' title='About this document...' />
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+<title>6.1 Using the Postfix mail server</title>
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+
+<h2><a name="SECTION001610000000000000000">
+6.1 Using the Postfix mail server</a>
+</h2>
+
+<p>
+Mailman should work pretty much out of the box with a standard Postfix
+installation.  It has been tested with various Postfix versions up to and
+including Postfix 2.1.5.
+
+<p>
+In order to support Mailman's optional VERP delivery, you will want to disable
+<code>luser_relay</code> (the default) and you will want to set
+<code>recipient_delimiter</code> for extended address semantics.  You should comment
+out any <code>luser_relay</code> value in your <span class="file">main.cf</span> and just go with the
+defaults.  Also, add this to your <span class="file">main.cf</span> file:
+
+<p>
+<div class="verbatim"><pre>
+    recipient_delimiter = +
+</pre></div>
+
+<p>
+Using "<tt class="samp">+</tt>" as the delimiter works well with the default values for
+<var>VERP_FORMAT</var> and <var>VERP_REGEXP</var> in <span class="file">Defaults.py</span>.
+
+<p>
+When attempting to deliver a message to a non-existent local address, Postfix
+may return a 450 error code.  Since this is a transient error code, Mailman
+will continue to attempt to deliver the message for
+<var>DELIVERY_RETRY_PERIOD</var> - 5 days by default.  You might want to set
+Postfix up so that it returns permanent error codes for non-existent local
+users by adding the following to your <span class="file">main.cf</span> file:
+
+<p>
+<div class="verbatim"><pre>
+    unknown_local_recipient_reject_code = 550
+</pre></div>
+
+<p>
+Finally, if you are using Postfix-style virtual domains, read the section on
+virtual domain support below.
+
+<p>
+
+<p><br /></p><hr class='online-navigation' />
+<div class='online-navigation'>
+<!--Table of Child-Links-->
+<a name="CHILD_LINKS"><strong>Subsections</strong></a>
+
+<ul class="ChildLinks">
+<li><a href="node13.html">6.1.1 Integrating Postfix and Mailman</a>
+<li><a href="postfix-virtual.html">6.1.2 Virtual domains</a>
+<li><a href="node15.html">6.1.3 An alternative approach</a>
+</ul>
+<!--End of Table of Child-Links-->
+</div>
+
+<div class="navigation">
+<div class='online-navigation'>
+<p></p><hr />
+<table align="center" width="100%" cellpadding="0" cellspacing="2">
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+  href="node13.html"><img src='next.png'
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+<td align="center" width="100%">GNU Mailman - Installation Manual</td>
+<td class='online-navigation'><img src='blank.png'
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+<td class='online-navigation'><img src='blank.png'
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+<td class='online-navigation'><img src='blank.png'
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+<b class="navlabel">Previous:</b>
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+<b class="navlabel">Up:</b>
+<a class="sectref" rel="parent" href="mail-server.html">6 Set up your</a>
+<b class="navlabel">Next:</b>
+<a class="sectref" rel="next" href="node13.html">6.1.1 Integrating Postfix and</a>
+</div>
+</div>
+<hr />
+<span class="release-info">Release 2.1, documentation updated on December 5, 2007.</span>
+</div>
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+
+</body>
+</html>