Image spam now in the billions
Global spam has increased nearly 100 percent year on year according to current statistics from the IronPort Threat Operation Centre - a key driver of which is the proliferation of image-based spam.
According to IronPort's statistics, worldwide spam levels in October 2005 were 31 billion messages per day. That figure has risen to 61 billion messages per day in 2006.
25 percent of this spam was image-based compared to 4.8 percent the year before. The average message size also increased from 8.9 kilobytes to 13 kilobytes. Global spam contributed to more than 819 terabytes of bandwith per day during 2006.
» Computerworld Australia - Michael Crawford - 17-11-2006