I got SA working on XP about a month ago. Since then it has worked beautifully. I'm at about a 0% false positive and maybe 1% false negative. (I used SAproxy for a long time, and had a lot of spam to learn from.)
I'm using SpamGrinderProxy (with its internal filters turned off), Spamassassin 2.63, ActivePerl 5.6.1, Net::DNS 0.12, and NMAKE 1.50. It was always slow. Somewhat slower than SAProxy, and a lot slower than just getting my mail through the normal means. Within the last week or so, it has been slowing down more and more, until now I can't use it to get mail anymore at all. Things sit and sit until my connection times out. It may get twenty emails, it may get 7, or 15, it's never repeatable. However, every time it stalls, I can go straight to my POP server instead of localhost and get all my mail in a snap. Any suggestions as to where to look, or requests for more info? TIA, grant
