For years now, anti-spam efforts have been like a game of checkers played at night. The bad guys make their move, Postini responds, and the majority of our customers are pleasantly oblivious to the fact that as much as 90 percent of their incoming mail is spam. This year, it became a game of chess. Data from Postini data centers shows that virus attacks hit record levels, spam percentages in Europe are catching up with global trends, and the volume of spam became more volatile as spammers dramatically varied their tactics, as seen in this graph:

To find out what made 2007 really different from any earlier year, and to see some forecasts for 2008, check out the the Google Enterprise blog.