Like other posters, I don't have real stats on the amount of spam that makes it past the filters, other than my own mailbox. I typically get from 2-3 spam messages per day, on rare occasions, maybe 6-10. We use blacklisting, the SARE rules, ImageInfo, FuzzyOCR and local custom rules.
Our overall stats for the last 24 hours are: Msgs %total %after rbl total incoming messages: 84620 100% -- rejected (cbl.abuseat.org, list.dsbl.org): 57624 68% -- viruses (ClamAV): 183 0.2% 0.7% spam (blocked): 22294 26% 83% possible spam (sent to user mailbox): 252 0.3% 0.9% clean (sent to user mailbox): 1828 2.2% 6.8% So, bottom line, of all the incoming mail, only 2.5% is actually delivered to a customer mailbox. -Bill