Top Countries of Spam Origin

During the first six months of 2007, 47% of all spam detected worldwide originated in the United States. This is likely due to the high number of broadband users in that country and the high percentage of bot-infected computers located there. The United States was also the top country of spam origin in the second half of 2006, when 44% of spam originated there. The second-highest source of spam this period was a group of undetermined European Union countries, from where 7% of all detected spam originated during this period. China was the third-highest country of spam origin in the first half of 2007.

Source: Symantec Internet Security Threat Report, Vol. XII