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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>20.13. smtpd — SMTP Server — Python 2.7.16 documentation</title> <link rel="stylesheet" href="../_static/classic.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript" id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <script type="text/javascript" src="../_static/sidebar.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within Python 2.7.16 documentation" href="../_static/opensearch.xml"/> <link rel="author" title="About these documents" href="../about.html" /> <link rel="index" title="Index" href="../genindex.html" /> <link rel="search" title="Search" href="../search.html" /> <link rel="copyright" title="Copyright" href="../copyright.html" /> <link rel="next" title="20.14. telnetlib — Telnet client" href="telnetlib.html" /> <link rel="prev" title="20.12. smtplib — SMTP protocol client" href="smtplib.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> <link rel="canonical" href="https://docs.python.org/2/library/smtpd.html" /> <script type="text/javascript" src="../_static/copybutton.js"></script> </head><body> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="telnetlib.html" title="20.14. telnetlib — Telnet client" accesskey="N">next</a> |</li> <li class="right" > <a href="smtplib.html" title="20.12. smtplib — SMTP protocol client" accesskey="P">previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> »</li> <li> <a href="../index.html">Python 2.7.16 documentation</a> » </li> <li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li> <li class="nav-item nav-item-2"><a href="internet.html" accesskey="U">20. Internet Protocols and Support</a> »</li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <div class="section" id="module-smtpd"> <span id="smtpd-smtp-server"></span><h1>20.13. <a class="reference internal" href="#module-smtpd" title="smtpd: A SMTP server implementation in Python."><code class="xref py py-mod docutils literal notranslate"><span class="pre">smtpd</span></code></a> — SMTP Server<a class="headerlink" href="#module-smtpd" title="Permalink to this headline">¶</a></h1> <p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/2.7/Lib/smtpd.py">Lib/smtpd.py</a></p> <hr class="docutils" /> <p>This module offers several classes to implement SMTP servers. One is a generic do-nothing implementation, which can be overridden, while the other two offer specific mail-sending strategies.</p> <div class="section" id="smtpserver-objects"> <h2>20.13.1. SMTPServer Objects<a class="headerlink" href="#smtpserver-objects" title="Permalink to this headline">¶</a></h2> <dl class="class"> <dt id="smtpd.SMTPServer"> <em class="property">class </em><code class="descclassname">smtpd.</code><code class="descname">SMTPServer</code><span class="sig-paren">(</span><em>localaddr</em>, <em>remoteaddr</em><span class="sig-paren">)</span><a class="headerlink" href="#smtpd.SMTPServer" title="Permalink to this definition">¶</a></dt> <dd><p>Create a new <a class="reference internal" href="#smtpd.SMTPServer" title="smtpd.SMTPServer"><code class="xref py py-class docutils literal notranslate"><span class="pre">SMTPServer</span></code></a> object, which binds to local address <em>localaddr</em>. It will treat <em>remoteaddr</em> as an upstream SMTP relayer. Both <em>localaddr</em> and <em>remoteaddr</em> should be a <a class="reference internal" href="socket.html#host-port"><span class="std std-ref">(host, port)</span></a> tuple. The object inherits from <a class="reference internal" href="asyncore.html#asyncore.dispatcher" title="asyncore.dispatcher"><code class="xref py py-class docutils literal notranslate"><span class="pre">asyncore.dispatcher</span></code></a>, and so will insert itself into <a class="reference internal" href="asyncore.html#module-asyncore" title="asyncore: A base class for developing asynchronous socket handling services."><code class="xref py py-mod docutils literal notranslate"><span class="pre">asyncore</span></code></a>’s event loop on instantiation.</p> <dl class="method"> <dt id="smtpd.SMTPServer.process_message"> <code class="descname">process_message</code><span class="sig-paren">(</span><em>peer</em>, <em>mailfrom</em>, <em>rcpttos</em>, <em>data</em><span class="sig-paren">)</span><a class="headerlink" href="#smtpd.SMTPServer.process_message" title="Permalink to this definition">¶</a></dt> <dd><p>Raise <a class="reference internal" href="exceptions.html#exceptions.NotImplementedError" title="exceptions.NotImplementedError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">NotImplementedError</span></code></a> exception. Override this in subclasses to do something useful with this message. Whatever was passed in the constructor as <em>remoteaddr</em> will be available as the <code class="xref py py-attr docutils literal notranslate"><span class="pre">_remoteaddr</span></code> attribute. <em>peer</em> is the remote host’s address, <em>mailfrom</em> is the envelope originator, <em>rcpttos</em> are the envelope recipients and <em>data</em> is a string containing the contents of the e-mail (which should be in <span class="target" id="index-0"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc2822.html"><strong>RFC 2822</strong></a> format).</p> </dd></dl> </dd></dl> </div> <div class="section" id="debuggingserver-objects"> <h2>20.13.2. DebuggingServer Objects<a class="headerlink" href="#debuggingserver-objects" title="Permalink to this headline">¶</a></h2> <dl class="class"> <dt id="smtpd.DebuggingServer"> <em class="property">class </em><code class="descclassname">smtpd.</code><code class="descname">DebuggingServer</code><span class="sig-paren">(</span><em>localaddr</em>, <em>remoteaddr</em><span class="sig-paren">)</span><a class="headerlink" href="#smtpd.DebuggingServer" title="Permalink to this definition">¶</a></dt> <dd><p>Create a new debugging server. Arguments are as per <a class="reference internal" href="#smtpd.SMTPServer" title="smtpd.SMTPServer"><code class="xref py py-class docutils literal notranslate"><span class="pre">SMTPServer</span></code></a>. Messages will be discarded, and printed on stdout.</p> </dd></dl> </div> <div class="section" id="pureproxy-objects"> <h2>20.13.3. PureProxy Objects<a class="headerlink" href="#pureproxy-objects" title="Permalink to this headline">¶</a></h2> <dl class="class"> <dt id="smtpd.PureProxy"> <em class="property">class </em><code class="descclassname">smtpd.</code><code class="descname">PureProxy</code><span class="sig-paren">(</span><em>localaddr</em>, <em>remoteaddr</em><span class="sig-paren">)</span><a class="headerlink" href="#smtpd.PureProxy" title="Permalink to this definition">¶</a></dt> <dd><p>Create a new pure proxy server. Arguments are as per <a class="reference internal" href="#smtpd.SMTPServer" title="smtpd.SMTPServer"><code class="xref py py-class docutils literal notranslate"><span class="pre">SMTPServer</span></code></a>. Everything will be relayed to <em>remoteaddr</em>. Note that running this has a good chance to make you into an open relay, so please be careful.</p> </dd></dl> </div> <div class="section" id="mailmanproxy-objects"> <h2>20.13.4. MailmanProxy Objects<a class="headerlink" href="#mailmanproxy-objects" title="Permalink to this headline">¶</a></h2> <dl class="class"> <dt id="smtpd.MailmanProxy"> <em class="property">class </em><code class="descclassname">smtpd.</code><code class="descname">MailmanProxy</code><span class="sig-paren">(</span><em>localaddr</em>, <em>remoteaddr</em><span class="sig-paren">)</span><a class="headerlink" href="#smtpd.MailmanProxy" title="Permalink to this definition">¶</a></dt> <dd><p>Create a new pure proxy server. Arguments are as per <a class="reference internal" href="#smtpd.SMTPServer" title="smtpd.SMTPServer"><code class="xref py py-class docutils literal notranslate"><span class="pre">SMTPServer</span></code></a>. Everything will be relayed to <em>remoteaddr</em>, unless local mailman configurations knows about an address, in which case it will be handled via mailman. Note that running this has a good chance to make you into an open relay, so please be careful.</p> </dd></dl> </div> </div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h3><a href="../contents.html">Table Of Contents</a></h3> <ul> <li><a class="reference internal" href="#">20.13. <code class="docutils literal notranslate"><span class="pre">smtpd</span></code> — SMTP Server</a><ul> <li><a class="reference internal" href="#smtpserver-objects">20.13.1. SMTPServer Objects</a></li> <li><a class="reference internal" href="#debuggingserver-objects">20.13.2. DebuggingServer Objects</a></li> <li><a class="reference internal" href="#pureproxy-objects">20.13.3. PureProxy Objects</a></li> <li><a class="reference internal" href="#mailmanproxy-objects">20.13.4. MailmanProxy Objects</a></li> </ul> </li> </ul> <h4>Previous topic</h4> <p class="topless"><a href="smtplib.html" title="previous chapter">20.12. <code class="docutils literal notranslate"><span class="pre">smtplib</span></code> — SMTP protocol client</a></p> <h4>Next topic</h4> <p class="topless"><a href="telnetlib.html" title="next chapter">20.14. <code class="docutils literal notranslate"><span class="pre">telnetlib</span></code> — Telnet client</a></p> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../_sources/library/smtpd.rst.txt" rel="nofollow">Show Source</a></li> </ul> </div> <div id="searchbox" style="display: none" role="search"> <h3>Quick search</h3> <div class="searchformwrapper"> <form class="search" action="../search.html" method="get"> <input type="text" name="q" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <div class="clearer"></div> </div> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="telnetlib.html" title="20.14. telnetlib — Telnet client" >next</a> |</li> <li class="right" > <a href="smtplib.html" title="20.12. smtplib — SMTP protocol client" >previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> »</li> <li> <a href="../index.html">Python 2.7.16 documentation</a> » </li> <li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li> <li class="nav-item nav-item-2"><a href="internet.html" >20. 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