I Hate Spam from Sunbelt Software is a winner. I’m using it with Outlook 2002. It costs almost nothing ($19.95), it installed easily, and it works like a charm. It blocked 150 messages for me in the last two days; it missed three (each of which can be easily identified as spam so they don’t reappear), and there have been no false positives. Highly recommended if you’re using Outlook 2000 or Outlook 2002!