It must be pretty difficult maintain these header and body patterns and the others lists. I had same problem and I resolve if by "spamassassin", it knows learn and it's more simple than procmailrc coding. Now I have cca 5% of all spams in my INBOX.
It's not that difficult here but I'm using Postfix, which has built in pattern checking. Because my mail server also hosts a bunch of topical internet mailing lists (mainly motorcycle and bass player stuff) and all of their admin addresses were harvested by spammers long ago, I don't just get one copy of spam. I usually get several because each of those admin addresses eventually alias back to me.
I don't use SpamAssassin or Razor but I manage to kill 95% of spam at the SMTP stage, before the message is accepted for delivery. This works better than a delivery stage mail processor like procmail because it bounces the spam back to the server actually sending it. It's easy to see from the maillogs what IPs are regularly sending me this crap so they can be blackholed permanently. I think I've got most of CHINANET in the bit bucket now <g>.
---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
