95 percent of all corporate email is spam

Email and web security vendor Barracuda networks has released its annual spam report, in which it claims that between 90 and 95 percent of all email sent in the year 2007 was unsolicited. The company analyzed over a billion email messages sent to its 50k clients every day in preparing the report.
A related study of 261 business professionals found that 57 percent of respondents viewed spam as the worst form of junk advertising, more so than postal junk mail and telemarketing. While 50 percent received five or fewer spam emails each day, 13 percent reported receiving over 50 such messages each day.