Since its inception, the IronPort Threat Operations Center has been tracking worldwide spam volume. Changes in spam volume can be attributed to numerous factors including the variety of methods used by spammers and capture rates due to the ability (or inability) of anti-spam solutions to keep up with rapidly changing techniques.

The graph below expresses the number of spam messages over a specified amount of time. The table contains additional vectors to help show how spam relates to global email volume and its own average statistics.

Global spam volume
Date Spam Volume (Billions) % of Global Email Volume Spam Volume Change 2010 Sep 01 309.4 85.4% 0% 2010 Aug 31 307.5 85.5% -1% 2010 Aug 30 313.0 85.6% 22% 2010 Aug 29 255.5 85.6% -4% 2010 Aug 28 267.3 85.7% -15% 2010 Aug 27 314.6 85.6% -6% 2010 Aug 26 336.3 85.6% -3%