Viktor,
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient------- 77E39131AF 2895 Thu Sep 27 11:42:12 me@cuddy.localdomain (host smtp.example.com[00.000.00.000] said: 450 4.1.8 <me@cuddy.localdomain>: Sender address rejected: Domain not found (in reply to RCPT TO command)) m...@somedomain.comNote that the *sender* domain is "cuddy.localdomain". Note also that the reject message is "*Sender* address rejected". Does "cuddy.localdomain" resolve via DNS on your system?
I did note the sender domain, and cuddy.localdomain does not resolve via DNS on my system. My question is why the identical configuration works in Postfix 3.1 and 2.9.
Actually, it is the *remote* system "smtp.example.com" that did not accept this mail, because the *sender* address is invalid. Not much you can do about that on the sending end. Either use a valid sender address, or convince the remote system to accept the mail.
I control smtp.example.com, so I'm able to make it accept whatever I'm sending to it. I also don't mind making the changes, but I'd like to understand why I'm making them because of the apparent different behavior in the previous Postfix versions. -- Gary Chambers
