johnea: > In addition to new versions of everything, I'd like to make some > major improvements to our SPAM rejection. > It seems the most effective thing in the lineup now, are the RBLs.
Postfix supports DNSBLs and whitelists. For this I suggest postscreen as documented at http://www.postfix.org/POSTSCREEN_README.html This blocks mail based on SMTP client properties, regardless of who they are sending mail to. > One idea that I've been considering is to eliminate mail that shows > up for multiple (unrelated) users, on different domains, within a > short amount of time. > I've noticed (I'm sure this isn't original) that SPAM messages > often show up for many users across different domains all at once. This would block mail from legitimate mailing lists. You cannot decide that mail is spam just because it is sent to users in different domains. Wietse
