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+++ b/admin/www/mailman-admin/node24.html
@@ -1,124 +1,128 @@
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+<title>2.7.4 Spam Filters</title>
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-<H3><A NAME="SECTION002373000000000000000">
-3.7.3 Recipient Filters</A>
+<H3><A NAME="SECTION002274000000000000000">
+2.7.4 Spam Filters</A>
</H3>
<P>
-The variables in this section control various filters based on the
-recipient of the message.
+This section provides some adjuncts to spam fighting tools; it
+doesn't replace dedicated anti-spam tools such as SpamAssassin or
+Spambayes.
<P>
<DL>
-<DT><STRONG>require_explicit_destination</STRONG></DT>
-<DD>This controls whether the mailing list posting address must be
- explicitly named in the <span class="mailheader">To:</span> or <span class="mailheader">Cc:</span>
- recipient lists. The main reason why it wouldn't is if the
- message was blind-carbon-copied (i.e. <span class="mailheader">Bcc:</span>'d) to the
- list. Spammers like to do this, but sometimes legitimate messages
- are forwarded to the list this way.
+<DT><STRONG>bounce_matching_headers</STRONG></DT>
+<DD>This variable contains header regular expressions, one per line,
+ and if any of a message's headers matches one of these patterns,
+ it will be held for moderation. The format is a colon separated
+ header and value, where the header is case insensitive and the
+ value is any valid Python regular expression. Lines that start
+ with # are ignored.
<P>
-If the list is not explicitly addressed and this setting is turned
- on, the message will be held for moderator approval.
+This variable can be used to catch known spammers by writing
+ regexps that match against <span class="mailheader">To:</span> or <span class="mailheader">Cc:</span>
+ lines, or known-bad <span class="mailheader">Message-ID:</span>s. Perhaps more useful
+ though are patterns that match headers added by spam detection
+ tools higher up in the tool chain. For example, you might
+ configure SpamAssassin to add an <span class="mailheader">X-Spam-Score:</span> header
+ with between zero and 5 stars depending on the spam score. Then
+ you can add a line to this variable like:
<P>
-</DD>
-<DT><STRONG>acceptable_aliases</STRONG></DT>
-<DD>This is the list of alternative addresses that are acceptable as a
- list posting address when <code>require_explicit_destination</code> is
- enabled. This is useful for when there aliases for the main
- posting address (e.g. <code>help@example.com</code> may be an alias for
- <code>help-list@example.com</code>).
+<div class="verbatim"><pre>
+ X-Spam-Score: [*]{3,5}
+</pre></div>
<P>
-</DD>
-<DT><STRONG>max_num_recipients</STRONG></DT>
-<DD>This is the maximum number of explicit recipients that are allowed
- on the posted message. Spammers sometimes send messages with lots
- of explicit recipients, so setting this number to a reasonable
- value may cut down on spam.
+This line will match from 3 to 5 stars in the value of this
+ field.
</DD>
</DL>
<P>
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+<td class='online-navigation'><a rel="contents" title="Table of Contents"
+ href="contents.html"><img src='contents.png'
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-<b class="navlabel">Previous:</b> <a class="sectref" HREF="node23.html">3.7.2 Sender filters</A>
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-<b class="navlabel">Next:</b> <a class="sectref" HREF="node25.html">3.7.4 Spam Filters</A>
-<hr>
-<span class="release-info">Release 2.1, documentation updated on October 2, 2004.</span>
+<div class='online-navigation'>
+<b class="navlabel">Previous:</b>
+<a class="sectref" rel="prev" href="node23.html">2.7.3 Recipient Filters</A>
+<b class="navlabel">Up:</b>
+<a class="sectref" rel="parent" href="node20.html">2.7 The Privacy Options</A>
+<b class="navlabel">Next:</b>
+<a class="sectref" rel="next" href="node25.html">2.8 The Bounce Processing</A>
+</div>
+</div>
+<hr />
+<span class="release-info">Release 2.1, documentation updated on December 13, 2004.</span>
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