I asked this question in another blogs post, most likely titled the same, about six months ago. Well, I have the answer now.

Here goes:

  1.  UNITED STATES
  2. CHINA
  3. REPUBLIC OF KOREA
  4. POLAND
  5. FRANCE
  6. SPAIN
  7. BRAZIL
  8. NETHERLANDS
  9. JAPAN
  10. GERMANY

China and the US account for 46% of the spam (23% each right now) currently going through the system. Korea holds it’s own with 9% and all the rest have 6% or less.

As of now I’m considering making a filter that will mark all mail from any particular country as bad, unless the email address is on a white list. In that case it would get through just fine, unless sit was a virus. The country list to block would be up to individual domain administrators.

I’m not sure how many people would use it, but I think it would be a good way to block bad mail that would otherwise get through or be marked as neutral.