SHIFTING FROM DAILY nuisance to serious IT and business concern, uncontrolled spam is prompting customers to arm themselves with tools to fight back against productivity loss, potential liability, and bandwidth-clogging consequences that unsolicited commercial e-mail can bring to an enterprise.

Targeting a growing concern on the anti-spam battlefront, IronPort Systems on Wednesday introduced technology designed to prevent legitimate e-mail messages from being weeded out by anti-spam filters.

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