ZDNet: Tech Update
Enterprises are being besieged with increasingly more junk e-mail. It may be inherently worthless, but spam doesn't come free. It hogs your bandwidth, diverts your employees from their daily tasks, and, if the message is potentially offensive or X-rated, it could land your company in court.
http://techupdate.zdnet.com/techupdate/filters/specialreport/0,14622,6022207,00.html