I've been thoroughly impressed with Apple's Mail spam filter that uses latent semantic indexing, a technique I first learned for an effective web indexing system. I am curious if anyone knows if there is a similar system available for e-mail servers or clients elsewhere in the computer world, specifically Linux. Right now my Linux server gets about 90% of the spam coming in using SpamAssassin, while Mail I have noticed gets near 98% of mine. Does anyone know if there is such a port available on Linux? Perhaps for the Pine e-mail client? I think I will ultimately combine the two (right now I'm not using SpamAssassin on the account that my Mac reads) for maximum effectiveness, but I was curious if I could simply use Mac's filter from the beginning.