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authorbwarsaw <>2004-12-14 04:27:49 +0000
committerbwarsaw <>2004-12-14 04:27:49 +0000
commit7fd3afbe2480275fe41fa0169ed72abd1f425048 (patch)
treeaa1f078e792f2f221b650b9ebb2749df42abb2e8 /admin/www/mailman-install/node25.html
parentf7c56e34ea25695bafa11ed28e0384671a309ac3 (diff)
downloadmailman2-7fd3afbe2480275fe41fa0169ed72abd1f425048.tar.gz
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Committing lots of documentation updates, including linking up to the new
mailman-installation guide, and filling out the other formats that seemed to be missing.
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+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<html>
+<head>
+<link rel="STYLESHEET" href="mailman-install.css" type='text/css' />
+<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...' />
+<link rel="next" href="node26.html" />
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+<link rel="parent" href="node16.html" />
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+<meta name='aesop' content='information' />
+<title>6.2.9 Receiver Verification</title>
+</head>
+<body>
+<DIV CLASS="navigation">
+<div id='top-navigation-panel' xml:id='top-navigation-panel'>
+<table align="center" width="100%" cellpadding="0" cellspacing="2">
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+<td class='online-navigation'><img src='blank.png'
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+<!--End of Navigation Panel-->
+
+<H3><A NAME="SECTION001629000000000000000">
+6.2.9 Receiver Verification</A>
+</H3>
+
+<P>
+Exim's receiver verification feature is very useful - it lets Exim reject
+unrouteable addresses at SMTP time. However, this is most useful for
+externally-originating mail that is addressed to mail in one of your local
+domains. For Mailman list traffic, mail originates on your server, and is
+addressed to random external domains that are not under your control.
+Furthermore, each message is addressed to many recipients
+- up to 500 if you use Mailman's default configuration and don't tweak
+<var>SMTP_MAX_RCPTS</var>.
+
+<P>
+Doing receiver verification on Mailman list traffic is a recipe for trouble.
+In particular, Exim will attempt to route every recipient addresses in
+outgoing Mailman list posts. Even though this requires nothing more than a
+few DNS lookups for each address, it can still introduce significant delays.
+Therefore, you should disable recipient verification for Mailman traffic.
+
+<P>
+Under Exim 3, put this in your main configuration section:
+
+<P>
+<div class="verbatim"><pre>
+ receiver_verify_hosts = !127.0.0.1
+</pre></div>
+
+<P>
+Under Exim 4, this is probably already taken care of for you by the default
+recipient verification ACL statement (in the <code>RCPT TO</code> ACL):
+
+<P>
+<div class="verbatim"><pre>
+ accept domains = +local_domains
+ endpass
+ message = unknown user
+ verify = recipient
+</pre></div>
+
+<P>
+which only does recipient verification on addresses in your domain. (That's
+not exactly the same as doing recipient verification only on messages coming
+from non-127.0.0.1 hosts, but it should do the trick for Mailman.)
+
+<P>
+
+<DIV CLASS="navigation">
+<div class='online-navigation'>
+<p></p><hr />
+<table align="center" width="100%" cellpadding="0" cellspacing="2">
+<tr>
+<td class='online-navigation'><a rel="prev" title="6.2.8 Problems"
+ href="node24.html"><img src='previous.png'
+ border='0' height='32' alt='Previous Page' width='32' /></A></td>
+<td class='online-navigation'><a rel="parent" title="6.2 Using the Exim"
+ href="node16.html"><img src='up.png'
+ border='0' height='32' alt='Up One Level' width='32' /></A></td>
+<td class='online-navigation'><a rel="next" title="6.2.10 SMTP Callback"
+ href="node26.html"><img src='next.png'
+ border='0' height='32' alt='Next Page' width='32' /></A></td>
+<td align="center" width="100%">GNU Mailman - Installation Manual</td>
+<td class='online-navigation'><img src='blank.png'
+ border='0' height='32' alt='' width='32' /></td>
+<td class='online-navigation'><img src='blank.png'
+ border='0' height='32' alt='' width='32' /></td>
+<td class='online-navigation'><img src='blank.png'
+ border='0' height='32' alt='' width='32' /></td>
+</tr></table>
+<div class='online-navigation'>
+<b class="navlabel">Previous:</b>
+<a class="sectref" rel="prev" href="node24.html">6.2.8 Problems</A>
+<b class="navlabel">Up:</b>
+<a class="sectref" rel="parent" href="node16.html">6.2 Using the Exim</A>
+<b class="navlabel">Next:</b>
+<a class="sectref" rel="next" href="node26.html">6.2.10 SMTP Callback</A>
+</div>
+</div>
+<hr />
+<span class="release-info">Release 2.1, documentation updated on December 13, 2004.</span>
+</DIV>
+<!--End of Navigation Panel-->
+
+</BODY>
+</HTML>