On 3/12/2013 1:55 PM, Alex wrote: > Hi, > >>> Mar 12 13:54:28 mail02 postfix/smtpd[24053]: NOQUEUE: reject: RCPT >>> from unknown[64.68.76.15]: 450 4.1.8 <appl...@tank.sub1.domain.com>: >>> Sender address rejected: Domain not found; >>> from=<appl...@tank.sub1.domain.com> to=<s...@mydomain.com> proto=ESMTP >>> helo=<mx02.example.com> >> >> this is being rejected by the reject_unknown_sender_domain >> restriction. The 450 suggests it's a temporary failure of some >> sort, but that doesn't mean it will correct itself without action by >> the remote sysadmin. >> >>> >>> In my check_sender_access file I have the following: >>> >>> 64.68.76.15 OK > > You have provided me with some great information that I will have to > review and be sure I understand properly. > > I even removed the reject_unknown_sender_domain restriction and the > mail still bounced. It probably has to do with the ordering > suggestions you've made below, but I added the IP to my_networks, and > now it's working. > > Could that mean that it was a different restriction that was rejecting > this mail,
The logs tell the story. The mail may have been rejected by a different restriction, or you may have more than one reject_unknown_sender_domain. > or is it still related to the unresolvable > appl...@tank.sub1.domain.com host as I initially thought? Don't say "host" here, this is an email address or (if you ignore the user@ part) a domain. Using the wrong terms adds to your confusion. Without the new log entry, we have no way of telling why it was still rejected. -- Noel Jones
