i think it could be added to freemail.pm to test if sender domain have spf or dkim and if no spf and or no dkim consider it as a freemail domain ?
i dont know if it require code changes to do this, but it make sense for me atleast to make it, no ?
objection, flames as i like to know how other thinks about it -- xpoint http://www.unicom.com/pw/reply-to-harmful.html