<header>Restrict ETRN command upon...</header>

<center><tt>smtpd_etrn_restrictions</tt></center>
<hr>

This parameter restricts what clients are allowed to issue the <tt>ETRN</tt>
command. The present Postfix <tt>ETRN</tt> differs from other <tt>ETRN</tt>
implementations in that it flushes mail for all destinations. This will change
in the future.

<p>

The default is to allow <tt>ETRN</tt> from any host. The following restrictions
are available:

<include smtpd_restrictions>

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