Good Spam Filters?
 

My spam rules are struggling to cope recently so can you recommend a good spam filter?

It can't be anything that uses crap blacklists like spamhaus or anything that needs to authorise people. Other than that all suggestions appreciated.

The junk mail filter in outlook 2007 is great - just a shame outlook 2007 is a buggy piece of crap (buggy even considering it's only beta).

I use Spamassasin + ClamAV. Works great.