Sophos’s latest report reveals that, although the USA remains the single worst offender, Asian nations contributed a significantly higher proportion of global spam than for the same period in Q3 2010.

During Q3 2010, Asia was responsible for 30% of all spam. The output has now increased to 50.1% from 35.1% at the beginning of 2011.

The top 12 spam relaying countries for July-September 2011

The top spam relaying continents for July – September 2011

If you want to help fight spam: Don’t ever be tempted to buy anything via spam, as that’s what makes it worthwhile for the spammers.