I just got done doing some short-term contract installation work which included setting up an Exchange server for internet email. The client is basically computer illiterate and remarkably paranoid. He wanted a suggestion for a product that would filter spam out. Seeing as how I would rather have been installing Postfix or Qmail, I didn't really have an answer to give him.

I was hoping someone out there could suggest a reasonably quality product that will filter spam for Exchange 2000 and that requires very little knowledgeable administration.