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 Mar 10 298.6 85.8% 30% 2010 Mar 09 228.9 85.6% -12% 2010 Mar 08 259.0 85.6% 27% 2010 Mar 07 203.8 85.6% -15% 2010 Mar 06 239.0 85.7% 4% 2010 Mar 05 230.8 85.8% 5% 2010 Mar 04 219.9 85.9% 1%