A software routine that deletes incoming spam or diverts it to a "junk" mailbox (see spam folder). Also called "spam blockers," spam filters are built into a user's email program. They are also built ...

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Network protection provider Internet Security Systems said Wednesday that it is acquiring privately held security software maker Cobion for $32.8 million to increase its spam filtering capabilities.

There's been a recent surge in a method to evade spam filters: disguising text by using the venerable ASCII art method. But so far, spammers are bungling the attempt. Stephen Shankland worked at CNET ...