On Sat, Oct 19, 2002 at 03:01:39PM -0500, Bryant, Eric D. wrote: > I am working on implementing a spam-filtering solution for Purdue > University and SpamAssassin is one of the products at the top of my > list. I'm wondering if you guys can give me some feedback as to what > your experiences have been thus far with SA. Here are some of the > questions I have: > > 1. Can SA work well as an opt-in/opt-out solution?
Yes. See http://www.spamassassin.org/sitewide.html > 2. What kind of false positive % should I expect? According to the latest set of scores: # SUMMARY for threshold 5.0: # Correctly non-spam: 168612 83.14% (99.38% of non-spam corpus) # Correctly spam: 30195 14.89% (91.12% of spam corpus) # False positives: 1056 0.52% (0.62% of nonspam, 12669 weighted) # False negatives: 2941 1.45% (8.88% of spam, 9981 weighted) # Average score for spam: 12.2 nonspam: -4.8 # Average for false-pos: 6.1 false-neg: 3.4 # TOTAL: 202804 100.00% So at a default threshold of 5.0, you could expect an FP rate of 0.62% At different thresholds: Threshold FP % FN% 5.5 0.33 1.91 6.0 0.23 2.33 6.5 0.15 2.78 7.0 0.10 3.22 8.0 0.03 4.19 9.0 0.01 5.17 10.0 and up 0.00 6.22 > 3. Maintainability: Does SA require a lot of maintenance on a day > to day basis? At first, possibly. You may need to tweak scores and add stuff to the whitelist, manually. After that, all you need to do is check for false positives (this may be left to the user) > 5. What MTA do you recommend? Whatever you are currently using (assuming that isn't something made by Microsoft) -- Duncan Findlay ------------------------------------------------------- This sf.net email is sponsored by: Access Your PC Securely with GoToMyPC. Try Free Now https://www.gotomypc.com/s/OSND/DD _______________________________________________ Spamassassin-talk mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/spamassassin-talk
