Nick Howitt: > I have the follosing restrictions in main.cf: > > smtpd_client_restrictions = permit_mynetworks, > reject_unknown_reverse_client_hostname
What is the output from "postconf mynetworks"? If the client matches that, then "permit_mynetworks" will override reject_unknown_reverse_client_hostname. Wietse > I would have expected this to have been dropped by the > reject_unknown_reverse_client_hostname filter as 220.191.208.116 does > not have a PTR record. The logs for this transaction (amavis and > opendkim removed to cut the output) are: > > Mar 24 10:09:30 server postfix/smtpd[8102]: warning: hostname > mail.hz.cn does not resolve to address 220.191.208.116 > Mar 24 10:09:30 server postfix/smtpd[8102]: connect from > unknown[220.191.208.116] > Mar 24 10:09:31 server postgrey[800]: action=pass, reason=triplet > found, delay=724, client_name=unknown, > client_address=220.191.208.116, sender=g...@hz.gov.cn, > recipient=usern...@howitts.co.uk > Mar 24 10:09:31 server postfix/smtpd[8102]: 6614E401361E: > client=unknown[220.191.208.116]