Noel Jones: > Maybe you can simply not offer DSN support to them when they > send mail to you. > http://www.postfix.org/postconf.5.html#smtpd_discard_ehlo_keyword_address_maps > The table entry would look like this, note the key must be an > IP, not a hostname: > ip.of.bad.client dsn, silent-discard
This is the recommended way of dealing with sites that have
problematic DSN implementations. Postfix has a similar setting for
mail that it sends out (smtp_discard_ehlo_keyword_address_maps).
Wietse
