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<title>GNU Mailutils Manual: Python Maidag Filters</title>

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<a name="Python-Maidag-Filters"></a>
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<p>
Previous: <a href="Scheme-Maidag-Filters.html#Scheme-Maidag-Filters" accesskey="p" rel="prev">Scheme Maidag Filters</a>, Up: <a href="Maidag-Scripting.html#Maidag-Scripting" accesskey="u" rel="up">Maidag Scripting</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="Python-Maidag-Filters-1"></a>
<h4 class="subsubsection">2.11.5.3 Python Maidag Filters</h4>
<a name="index-script-2"></a>

<p>The file name of the Python mail filter is specified using
&lsquo;<samp>script</samp>&rsquo; configuration statement.  For example, the following
configuration statement:
</p>
<div class="example">
<pre class="example">script &quot;~/.maidag.py&quot;
</pre></div>

<p>instructs &lsquo;maidag&rsquo; to use file &lsquo;.maidag.py&rsquo; in the recipient home
directory as a Python filter.
</p>
<p>A simple example of a mail filter written in Python:
</p>
<div class="example">
<pre class="example">from mailutils import *
import maidag
import re

msg = message.Message (maidag.message)
hdr = msg.header

try:
    if 'List-Post' in hdr and 'Received' in hdr \
       and hdr['Received'].find ('fencepost.gnu.org') != -1:

        # check envelope's sender address
        m = re.search (r'([\w\-]+)-bounces\+([\w]+)=.*',
                       msg.envelope.get_sender ())
        if m:
            lbox = m.group (1)
            user = m.group (2)
            # open destination mailbox and append message
            dst = mailbox.MailboxDefault ('~/Mail/%s' % lbox)
            dst.open ('ac')
            dst.append_message (msg)
            dst.close ()
            # set deleted flag so maidag will not deliver msg elsewhere
            msg.attribute.set_deleted ()
except Exception:
    pass
</pre></div>




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