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<h2><a name="SECTION001630000000000000000">
6.3 Using the Sendmail mail server</a>
</h2>
<p>
<div class="warning"><b class="label">Warning:</b>
You may be tempted to set the <var>DELIVERY_MODULE</var> configuration variable in
<span class="file">mm_cfg.py</span> to <code>'Sendmail'</code> when using the Sendmail mail server.
<strong>Don't</strong>. The <span class="file">Sendmail.py</span> module is misnamed - it's really a
command line based message handoff scheme as opposed to the SMTP scheme used
in <span class="file">SMTPDirect.py</span> (the default). <span class="file">Sendmail.py</span> has known security
holes and is provided as a proof-of-concept only<a name="tex2html4"
href="#foot437"><sup>4</sup></a>. If you are having problems
using <span class="file">SMTPDirect.py</span> fix those instead of using <span class="file">Sendmail.py</span>, or
you may open your system up to security exploits.
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<br><hr><h4>Footnotes</h4>
<dl>
<dt><a name="foot437">... only</a><A
HREF="node31.html#tex2html4"><sup>4</sup></a></dt>
<dd>In fact, in later
versions of Mailman, this module is explicitly sabotaged. You have to know
what you're doing in order to re-enable it.
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<li><a href="node32.html">6.3.1 Sendmail ``smrsh'' compatibility</a>
<li><a href="node33.html">6.3.2 Integrating Sendmail and Mailman</a>
<li><a href="node34.html">6.3.3 Performance notes</a>
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<span class="release-info">Release 2.1, documentation updated on June 2, 2017.</span>
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