hi Kevin, Em Sex, 2003-07-25 ās 07:07, Kevin Buzzard escreveu: > On 24 Jul 2003, Raul Dias wrote: > > > Something I found interesting was using Razor + Pyzor + Dcc. > > Then I create meta rules that matchs: > > Razor + Pyzor > > Razor + Dcc > > Pyzor + Dcc > > Razor + Pyzor + Dcc (this will also, of course, match all three before). > > This is definitely an interesting idea! But is it a good one? Perhaps > (indeed probably) but one has to answer the following question > before one is sure. Can anyone here answer it? (I've made the question > a bit wordy but the idea is simple). > > This idea above basically says "make it much more likely to > kill the email if it's on more than one spam blacklist site". > We have already established in this thread that it is probably *not* > a good idea in general to say "if razor says it's spam with > probability > 90% then it's spam" because razor can make mistakes, > or perhaps be tricked into making mistakes. Indeed the _point_ of spamassassin > is that it's giving you a whole host of other tests on top of razor. > Similarly we should not say "if pyzor says it's spam then it's spam" > and so on. So we are aware of the possibility that each of Razor, > Pyzor and Dcc are capable of making mistakes. [By "mistake" I mean here > "saying it's spam when it's not", I'm not getting into the issue > of saying it's not spam when it is.] [...]
I have being using this meta rules for some time now. What I have seen so far (I always try to read spam reports before deleting the spam): - It is common for Razor to trigger on hams. I would guess that 5% to 10%. - Sometime pyzor trigs on ham too. I would say 2% to 5%. - I have never seen Dcc trigger on ham, which is odd as the way Dcc works it should give more FP than Pyzor or Razor. - Have never seen any combination of Razor, Pyzor and/or Dcc trig on ham. Of course, I might have being lucky so far. I have my treshhold (SA-2.55) on 6.0 (I intend to raise to 7 in the future) and I filter my spam into 5 categories: - caught_spam (>6, <8) - low_spam (>8, <15) - medium_spam (>15, <30) - high_spam (>30) I have never got a FP on medium_spam and high_spam. I got really a few times FP on low_spam. Sometimes I get FP on caught_spam. This meta rules have help raising the spam class from (e.g low to medium, medium to high). Also when this meta rules are triggered, usually this is the least participation of the spam score. Usually it gets high bayes score, and at least 2 RBLs. In the future I intend to just filter out spam based on high scores sitewide. []'s Raul Dias ------------------------------------------------------- This SF.Net email sponsored by: Free pre-built ASP.NET sites including Data Reports, E-commerce, Portals, and Forums are available now. Download today and enter to win an XBOX or Visual Studio .NET. http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01 _______________________________________________ Spamassassin-talk mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/spamassassin-talk
