Jamie skrev den 2013-02-26 11:32:
We would appreciate your thoughts.
check that you have not external nameservers that can resolve localhost
into 127.0.0.1, but show logs on what postfix really did, even if sender
ip is localhost it should not allow relaying, unless you have
permit_mynetwork to early, thats why i only allow smpt auth relaying,
even from localhost/rfc1918 ips
to minimise the risk you should only trust localhost nameservers
and possible it would make sense to reject clients that have mx set as
localhost or 127.0.0.1
well i admit it just speculating here, so logs please, with postconf -n
