On 9/9/2016 6:47 AM, Allen Coates wrote: > > I was thinking along the lines of using > reject_unknown_reverse_client_hostname > <http://www.postfix.org/postconf.5.html#reject_unknown_reverse_client_hostname> > for IPv4, and the stronger reject_unknown_client_hostname > <http://www.postfix.org/postconf.5.html#reject_unknown_client_hostname> > for IPv6 > > I suppose I could put an "accept all IPv4 addresses" statement at the > end of an access list, and let IPv6 fall through to further tests.
Easy enough... Inside one of your smtpd_*_restrictions sections: ... reject_unknown_reverse_client_hostname check_client_access cidr:/etc/postfix/ipv6_client_check.cidr ... # ipv6_client_check.cidr: ::some:exception:network DUNNO # last line wildcard: ::/0 reject_unknown_client_hostname -- Noel Jones
