The biggest area where we need technological innovation in e-mail isn't in scalability or functionality but in spam prevention. Although Microsoft Corp.'s Exchange Server 2003 beta (see review, above) has an improved virus-scanning API, virus and spam checking is an area that Microsoft leaves to third parties.
The problem is that spam isn't a peripheral issue anymore. Spam isn't just e-mail's annoying little brother, who always hangs around wanting to be part of the action; it's a substantial threat to enterprise productivity.
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