Exchange 5.5/2000 Config/Security Recommendations.
I came across a couple of security pages on the MSFT site this afternoon which detail the steps that you need to take i.e. the service packs, security updates and fixes that you should apply, to ensure that your servers are built with both performance and security in mind. The “Configuration and Security Update Recommendations for Exchange Server 5.5” can be found here, and the same for Exchange 2000 can be found here. [MS Exchange Blog]