I created a blacklist rule to filter out messages:
From: *@job.com yes
It works, partly, except that part of those messages are sent with a return-path other than job.com. I Googled a bit and Mailscanner actually check the return-path field when you specify "From:". I can't seem to find a why to actually match the From header.
Is there a way to make a rule that matches the From header?