>> >> I've got every ruleset & blacklist available and I'm still getting >> buried - the bayes poison in all of the recent spam has wrecked that. >> Does anyone see a reason why I can't assume messages with blank >> subjects are junk? Also, I've got an idea about maybe doing an >> nslookup on the envelope sender domain and junking anything without an >> entry. I'm probably missing something that I should consider, >> especially on that last one. Would anyone care to educate me what I'm >> missing? >> >> Thanks! >> >> Mike-
Hi, in fact your MTA could already reject (with some 5xx error) all mails that you would not be able to reply to: envelope sender domain does not exist (neither MX nor A) MX has a private ip (these should be standard features of your MTA) >From domain does not exist SA would only see mails that pass these tests Wolfgang Hamann >> -- >> If you're not confused, you're not trying hard enough. >> -- >> Please note - Due to the intense volume of spam, we have installed >> site-wide spam filters at catherders.com. If email from you bounces, >> try non-HTML, non-encoded, non-attachments, >>
