Why spam filters don't work
Over the past decade, e-mail spam has come perilously close to destroying one of the most convenient and efficient communication methods yet devised. A postal box can be stuffed only so far as its physical dimensions will allow, and there is an actual cost associated with the printing and postage for postal junk mail. But an e-mail inbox has no physical limitations on the amount of junk e-mail it can contain, and the costs of sending out tens of thousands, or even millions, of e-mail spam are negligible.
By Brian Cartnell at Security Pipeline.
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