line, a <STRONG>Return-Path</STRONG> line, and a <STRONG>Delivered-To</STRONG> line.
<STRONG>preline</STRONG> is useful for <STRONG>procmail</STRONG> and ELM's <STRONG>filter</STRONG>, which do
not understand the <STRONG>qmail-command</STRONG> environment variables.
mbox(5)</A></STRONG></A></STRONG>&lt;/A&gt;&lt;/STRONG&gt;, &lt;STRONG&gt;&lt;A HREF="../cat8/qmail-command.0.html"&gt;<STRONG><A HREF="../cat8/qmail-command.0.html"><STRONG><A HREF="../cat8/qmail-command.0.html">qmail-command(8)</A></STRONG></A></STRONG>&lt;/A&gt;&lt;/STRONG&gt;