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  • Committer: Launchpad Patch Queue Manager
  • Date: 2009-10-21 01:06:17 UTC
  • mfrom: (975.1.1 mailman.2112)
  • Revision ID: launchpad@pqm.canonical.com-20091021010617-prbs2ay6nhxx515v
[rs=flacoste] Upgrade Mailman to upstream 2.1.12

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doc/mailman-install/node26.html
 
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
 
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<html>
 
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<head>
 
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<link rel="STYLESHEET" href="mailman-install.css" type='text/css' />
 
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<link rel="first" href="mailman-install.html" title='GNU mailman - installation Manual' />
 
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<link rel='last' href='about.html' title='About this document...' />
 
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<link rel='help' href='about.html' title='About this document...' />
 
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<link rel="next" href="node27.html" />
 
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<link rel="prev" href="node25.html" />
 
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<link rel="parent" href="node16.html" />
 
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<link rel="next" href="node27.html" />
 
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 
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<meta name='aesop' content='information' />
 
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<title>6.2.10 SMTP Callback</title>
 
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</head>
 
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<body>
 
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<div class="navigation">
 
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<div id='top-navigation-panel' xml:id='top-navigation-panel'>
 
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<table align="center" width="100%" cellpadding="0" cellspacing="2">
 
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<tr>
 
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<td class='online-navigation'><a rel="prev" title="6.2.9 receiver Verification"
 
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  href="node25.html"><img src='previous.png'
 
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<td class='online-navigation'><a rel="parent" title="6.2 using the Exim"
 
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<td class='online-navigation'><a rel="next" title="6.2.11 doing VERP with"
 
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<td align="center" width="100%">GNU Mailman - Installation Manual</td>
 
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<td class='online-navigation'><img src='blank.png'
 
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</tr></table>
 
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<div class='online-navigation'>
 
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<b class="navlabel">Previous:</b>
 
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<a class="sectref" rel="prev" href="node25.html">6.2.9 Receiver Verification</a>
 
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<b class="navlabel">Up:</b>
 
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<a class="sectref" rel="parent" href="node16.html">6.2 Using the Exim</a>
 
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<b class="navlabel">Next:</b>
 
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<a class="sectref" rel="next" href="node27.html">6.2.11 Doing VERP with</a>
 
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</div>
 
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<hr /></div>
 
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</div>
 
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<!--End of Navigation Panel-->
 
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<h3><a name="SECTION0016210000000000000000">
 
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6.2.10 SMTP Callback</a>
 
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</h3>
 
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<p>
 
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Exim's SMTP callback feature is an even more powerful way to detect bogus
 
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sender addresses than normal sender verification.  Unfortunately, lots of
 
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servers send bounce messages with a bogus address in the header, and there are
 
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plenty that send bounces with bogus envelope senders (even though they're
 
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supposed to just use an empty envelope sender for bounces).
 
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<p>
 
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In order to ensure that Mailman can disable/remove bouncing addresses, you
 
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generally want to receive bounces for Mailman lists, even if those bounces are
 
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themselves not bounceable.  Thus, you might want to disable SMTP callback on
 
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bounce messages.
 
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<p>
 
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With Exim 4, you can accomplish this using something like the following in
 
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your <code>RCPT TO</code> ACL:
 
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<p>
 
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<div class="verbatim"><pre>
 
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  # Accept bounces to lists even if callbacks or other checks would fail
 
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  warn     message      = X-WhitelistedRCPT-nohdrfromcallback: Yes
 
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           condition    = \
 
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           ${if and {{match{$local_part}{(.*)-bounces\+.*}} \
 
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                     {exists {MAILMAN_HOME/lists/$1/config.pck}}} \
 
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                {yes}{no}}
 
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  accept   condition    = \
 
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           ${if and {{match{$local_part}{(.*)-bounces\+.*}} \
 
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                     {exists {MAILMAN_HOME/lists/$1/config.pck}}} \
 
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                {yes}{no}}
 
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  # Now, check sender address with SMTP callback.
 
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  deny   !verify = sender/callout=90s
 
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</pre></div>
 
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<p>
 
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If you also do SMTP callbacks on header addresses, you'll want something like
 
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this in your <code>DATA</code> ACL:
 
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<p>
 
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<div class="verbatim"><pre>
 
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  deny   !condition = $header_X-WhitelistedRCPT-nohdrfromcallback:
 
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         !verify = header_sender/callout=90s
 
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</pre></div>
 
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<p>
 
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<div class="navigation">
 
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<div class='online-navigation'>
 
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<p></p><hr />
 
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<table align="center" width="100%" cellpadding="0" cellspacing="2">
 
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<tr>
 
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<td class='online-navigation'><a rel="prev" title="6.2.9 receiver Verification"
 
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  href="node25.html"><img src='previous.png'
 
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  border='0' height='32'  alt='Previous Page' width='32' /></a></td>
 
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<td class='online-navigation'><a rel="parent" title="6.2 using the Exim"
 
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  href="node16.html"><img src='up.png'
 
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  border='0' height='32'  alt='Up one Level' width='32' /></a></td>
 
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<td class='online-navigation'><a rel="next" title="6.2.11 doing VERP with"
 
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  href="node27.html"><img src='next.png'
 
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  border='0' height='32'  alt='Next Page' width='32' /></a></td>
 
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<td align="center" width="100%">GNU Mailman - Installation Manual</td>
 
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<td class='online-navigation'><img src='blank.png'
 
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  border='0' height='32'  alt='' width='32' /></td>
 
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<td class='online-navigation'><img src='blank.png'
 
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  border='0' height='32'  alt='' width='32' /></td>
 
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<td class='online-navigation'><img src='blank.png'
 
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  border='0' height='32'  alt='' width='32' /></td>
 
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</tr></table>
 
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<div class='online-navigation'>
 
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<b class="navlabel">Previous:</b>
 
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<a class="sectref" rel="prev" href="node25.html">6.2.9 Receiver Verification</a>
 
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<b class="navlabel">Up:</b>
 
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<a class="sectref" rel="parent" href="node16.html">6.2 Using the Exim</a>
 
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<b class="navlabel">Next:</b>
 
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<a class="sectref" rel="next" href="node27.html">6.2.11 Doing VERP with</a>
 
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</div>
 
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</div>
 
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<hr />
 
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<span class="release-info">Release 2.1, documentation updated on January 11, 2009.</span>
 
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</div>
 
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<!--End of Navigation Panel-->
 
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</body>
 
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</html>