Thanks for your interest in this topic. The part of mail.log and the qf file is at: http://pastebin.com/0QzqLxs1
This particular example has been marked as spam, but the sender's information didn't play a role in this classification. Re: Joseph Brennan: > Why doesn't sendmail reject it like it does here? (..) .. Domain name > required for sender address I cannot afford rejecting all null senders as those could be legitimate Delivery Status Notification messages. What I am looking is a pattern for line: MAIL FROM: <"do not mock at your poetenncy - bujyj vjaqrra ppislls" <>> while I want to allow: MAIL FROM: <> So any ideas are appreciated whether on sendmail or spamassassin level.