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<h2><a href="mailfront.html">MailFront</a></h2>
<h1>Protocol: smtp</h1>
<hr />
<p>The SMTP protocol module has the following features:</p>
<ul>
<li>Handles <a href="http://www.faqs.org/rfcs/rfc2554.html">RFC 2554</a>
SMTP authentication. Note that the <a
href="plugin-require-auth.html">require-auth plugin</a> and/or the <a
href="plugin-relayclient.html">relayclient plugin</a> will need to be
loaded to make use of this authentication.
<li>Automatically handles either bare NL or <a
href="http://www.faqs.org/rfcs/rfc821.html">RFC 821</a> / <a
href="http://www.faqs.org/rfcs/rfc2821.html">RFC 2821</a> compliant
CR/NL end-of-line conventions.
<li>Times out connections after <tt>$TIMEOUT</tt> seconds of inactivity
(defaults to 1200 seconds or 20 minutes), or <tt>$SESSION_TIMEOUT</tt>
seconds after the connection was established (defaults to 86400 seconds
or 24 hours).
<li>All error responses are logged.
<li>Handles (ignores) <a
href="http://www.faqs.org/rfcs/rfc1869.html">RFC 1869</a> extended
parameters on the <tt>RCPT TO:</tt> and <tt>MAIL FROM:</tt> commands.
<li>Initial greeting message is configureable by <tt>$SMTPGREETING</tt>.
If that is not set, the greeting is generated based on the domain name
in <tt>${$PROTO}LOCALHOST</tt> set by the invoking <a
href="http://cr.yp.to/proto/ucspi.txt">UCSPI</a> server such as <a
href="http://cr.yp.to/ucspi-tcp/tcpserver.html">tcpserver</a>.
<li>Supports <a href="http://www.faqs.org/rfcs/rfc1870.html">RFC
1870</a> SMTP Service Extension for Message Size Declaration.
<li>If <tt>$MAXNOTIMPL</tt> is set, clients are disconnected if they
send more than the specified number of commands that result in a
"<tt>500 Not implemented.</tt>" error.
</ul>
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