Asia leads the world in spam. While USA generated far more spam than any other single country, Europe for the first time surpasses USA--with Russia (8.3%), Turkey ( 3.8%) Italy (3.5%) Poland (3.4%) Germany (3.2%) Spain (3.1%) and UK (2.5%) all in the Top 12.

SophosLabs reveals a dramatic rise in the proportion of the world's spam messages come from compromised Russian computers. The country now accounts for 8.3% of the world's spam (or 1 in every 12 junk mails in our In Box).

"Responsible for a third of all unwanted email, USA and Russia can be viewed as the two dirty men of the spam generation, polluting email traffic with unwanted and potentially malicious messages," says Carole Theriault, senior security consultant at Sophos. "It's not the case that a third of the world's spammers are based in those countries, but that legions of computers are poorly defended, allowing hackers to break in and turn them into botnets for the spreading of spam and malware."

http://www.sophos.com/pressoffice/news/articles/2008/02/dirtydozfeb08.html