Does anybody have a good guideline on how Postfix and SpamAssassin should be configured for ultimate spam fighting?
Postfix has lots of settings and I don't know if our system is configured for best spam fighting. Our server is only hosting 40 domains and 200+ mail accounts. I think SpamAssassin is taking care of about 500-2000 spam every 24 hours, total for all mail accounts, still there are many spam mails that just slips thru each day (usually 5-20/account). We also have many backscatter mails with forged from addresses and/or HELO information, and I know there are header and body checks that can stop this, but I donâ