Why Bother Filtering Spam?

• Seems to be about 30% to 60% of mail traffic, and increasing

• Users are forced to waste time wading through their inbox

  • costs their employers money

• Impossible to unsubscribe

  • “unsubscribe” addresses work only 37% of the time, according to the FTC

• Legal retaliation not possible, yet

• Just plain irritating!