Decent article on Exchange2003 SP2 Anti-spam features

I found the link to the article below from Exchange Security but I think that despite Microsoft's efforts, which seem sincere, still the best option is choosing a company to outsource corporate anti-spam efforts.

It takes far too much time and effort to achieve even close to the accuracy that an gateway anti-spam service can deliver. Interestingly, despite Microsoft's "multi layered" approach with the Exchange Server System and SP 2 for Exchange 2003, we still see that Microsoft bought Front Bridge


Great article on SP2 spam filtering

My choice for Gateway Spam Filtering is: SpamSoap