Microsoft Exchange contains many of the usual anti-spam features found in most modern mail transfer agents. Microsoft Research has developed a plugin called Intelligent Message Filter, which appears to work like a Bayesian-style classifier, although without the capability for user training of the filter. Exchange has many traditional anti-spam-related features, including blackhole listing service blocking, filtering, and whitelists/blacklists. Microsoft Exchange can be set up as an outbound mail relay with SMTP AUTH/STARTTLS. For many organizations, the anti-spam features in Microsoft Exchange might need to be augmented.

In order to improve Microsoft Exchange’s ability to handle spam, we covered McAfee SpamKiller for Exchange 2.1.1. ...

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