+ <h2>Exim v4.x Relay Control</h2>
+
+ <p>Exim v4.x has completely different and considerably more
+ flexible mail policy controls than earlier versions. The
+ documentation is also considerable more complete and the default
+ configuration file has a well commented section on relay control
+ (in the <tt>RCPT TO</tt> ACL. You should instead read the
+ specification section on <a
+ href="http://www.exim.org/exim-html-4.20/doc/html/spec_37.html">Access
+ Control Lists</a>.</p>
+
+ <h2>Exim v3.x Relay Configuration Options</h2>