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diff --git a/doc/mailman-install/node26.html b/doc/mailman-install/node26.html new file mode 100644 index 00000000..5f960845 --- /dev/null +++ b/doc/mailman-install/node26.html @@ -0,0 +1,140 @@ +<!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="node27.html" /> +<link rel="prev" href="node25.html" /> +<link rel="parent" href="node16.html" /> +<link rel="next" href="node27.html" /> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> +<meta name='aesop' content='information' /> +<title>6.2.10 SMTP Callback</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"> +<tr> +<td class='online-navigation'><a rel="prev" title="6.2.9 receiver Verification" + href="node25.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="6.2.11 doing VERP with" + href="node27.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="node25.html">6.2.9 Receiver Verification</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="node27.html">6.2.11 Doing VERP with</a> +</div> +<hr /></div> +</div> +<!--End of Navigation Panel--> + +<h3><a name="SECTION0016210000000000000000"> +6.2.10 SMTP Callback</a> +</h3> + +<p> +Exim's SMTP callback feature is an even more powerful way to detect bogus +sender addresses than normal sender verification. Unfortunately, lots of +servers send bounce messages with a bogus address in the header, and there are +plenty that send bounces with bogus envelope senders (even though they're +supposed to just use an empty envelope sender for bounces). + +<p> +In order to ensure that Mailman can disable/remove bouncing addresses, you +generally want to receive bounces for Mailman lists, even if those bounces are +themselves not bounceable. Thus, you might want to disable SMTP callback on +bounce messages. + +<p> +With Exim 4, you can accomplish this using something like the following in +your <code>RCPT TO</code> ACL: + +<p> +<div class="verbatim"><pre> + # Accept bounces to lists even if callbacks or other checks would fail + warn message = X-WhitelistedRCPT-nohdrfromcallback: Yes + condition = \ + ${if and {{match{$local_part}{(.*)-bounces\+.*}} \ + {exists {MAILMAN_HOME/lists/$1/config.pck}}} \ + {yes}{no}} + {yes}{no}} + + accept condition = \ + ${if and {{match{$local_part}{(.*)-bounces\+.*}} \ + {exists {MAILMAN_HOME/lists/$1/config.pck}}} \ + {yes}{no}} + {yes}{no}} + + # Now, check sender address with SMTP callback. + deny !verify = sender/callout=90s +</pre></div> + +<p> +If you also do SMTP callbacks on header addresses, you'll want something like +this in your <code>DATA</code> ACL: + +<p> +<div class="verbatim"><pre> + deny !condition = $header_X-WhitelistedRCPT-nohdrfromcallback: + !verify = header_sender/callout=90s +</pre></div> + +<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="6.2.9 receiver Verification" + href="node25.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="6.2.11 doing VERP with" + href="node27.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="node25.html">6.2.9 Receiver Verification</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="node27.html">6.2.11 Doing VERP with</a> +</div> +</div> +<hr /> +<span class="release-info">Release 2.1, documentation updated on December 5, 2007.</span> +</div> +<!--End of Navigation Panel--> + +</body> +</html> |