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Now I understand what Postini is, the original question makes more
sense. I just read a review of their service from PC Magazine (linked from their site). They have a 1.4% false positive rate, and a 15.1% false negative rate. For a comparison, our first gateway customer (fairly small client) in the last three days has seen a 0.12% false positive rate, and a 0.61% false negative rate. The only FP was an ad from JCrew and was the result of just having installed Message Sniffer and needing to build up my whitelist for them. This account averages about 13.7 spams per day per account, though over 90% of it goes to just 15% of their users. I'd call that a good selling point :) I must confess though, their traffic was easy, but the majority of the false negatives will be gone after I block two more static spammers. Read about the results from that article for them and other companies at this link: http://www.postini.com/services/Postini_PC_Mag_11_2003.pdf Decent interface...very questionable results. Matt Sheldon Koehler wrote:
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