<header>Restrictions on client hostnames/addresses</header>
<center><tt>smtpd_client_restrictions</tt></center>
<hr>
This parameter specifies optional restrictions on SMTP client host names and
addresses.
<p>
The default is to allow connections from any host. The following
restrictions are available:
<include smtpd_restrictions>
Restrictions are applied in the order as specified; the first
restriction that matches wins.
<p>
Specify a list of restrictions, separated by commas and/or whitespace.
Continue long lines by starting the next line with whitespace.
<p>
Sensible examples:
<ul>
<li><tt>permit_mynetworks, reject_unknown_client</tt>
<li><tt>reject_maps_rbl, reject_unknown_client</tt>
</ul>
<hr>
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