Postfix Version: postfix-2.5.1-1.rhel5 I have an internal relay with an external NAT. The internal relay is not visible to the outside..
The receiving destination gives the error: --550 [PERMFAIL] xxx.xxx.net requires valid sender domain (in reply to RCPT TO command))
-- My question What is the most efficient way to "rewrite" the sender address with a valid smtp address to a "specific" domain. I only need to do this for 1 destination domain.. Thx CT
