doc/smtpd-starttls-proxy-io.html


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    <title>smtpd-starttls-proxy: the smtpd-starttls-proxy-io program</title>
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<p>
<a href="index.html">smtpd-starttls-proxy</a><br />
<a href="//skarnet.org/software/">Software</a><br />
<a href="//skarnet.org/">skarnet.org</a>
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<h1> The <tt>smtpd-starttls-proxy-io</tt> program </h1>

<p>
<tt>smtpd-starttls-proxy-io</tt> is a program that runs in front of a UCSPI-compliant
SMTP server (such as <tt>qmail-smtpd</tt>) and extends it with STARTTLS
capability.
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<p>
 <tt>smtpd-starttls-proxy-io</tt> provides no TLS on its own;
instead, it expects to be run under a
<a href="https://web.archive.org/web/20150311223933/http://www.suspectclass.com/sgifford/ucspi-tls/ucspi-tls.txt">UCSPI-TLS</a>
server, and interfaces with it.
</p>

<h2> Interface </h2>

<pre>
     smtpd-starttls-proxy-io <em>smtpd...</em>
</pre>

<ul>
 <li> <tt>smtpd-starttls-proxy-io</tt> spawns <em>smtpd...</em> as
a child process. It interposes itself between 
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