steve zeng: > Is there a postfix config to simply disable the syntax check on > MAIL FROM field?
In Postfix 2.7 and later. Your client syntax violates SMTP syntax (which was defined in 1982!!!) MAIL FROM: some non-standard crap <address> I recommend that you remove the non-standard crap from the client's address database, so that it contains only the email address, and so that the client will send: MAIL FROM:<address> Wietse