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Based on analysis of the spam it blocked for its 1,000-some clients during May, June, and July, message filtering firm CipherTrust said that a whopping 86 percent of all spam originated in the U.S.
Although U.S.-based IP addresses accounted for only 28 percent of the total addresses used to spam -- tying South Korea for the top spot -- spammers overwhelmingly favor U.S. domains. Messages from Korean IP addresses, in comparison, accounted for a paltry 3 percent of all spam mail. Similarly, China and Hong Kong, where about 23 percent of all spamming IP addresses reside, account for just 2.6 percent of all spam messages.
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Anti-spam specialist maps the spam world
Download 'Spam: a many rendered thing'
Sophos, a world leader in protecting businesses against spam and viruses, has published a report into the countries from which spam messages originate. Researchers scanned all spam messages received over two days last week and have revealed a 'dirty dozen' of offending countries with the United States topping the chart.
The 'dirty dozen' are as follows:
1. United States 56.74%
2. Canada 6.80%
3. China (& Hong Kong) 6.24%
4. South Korea 5.77%
5. Netherlands 2.13%
6. Brazil 2.00%
7. Germany 1.83%
8. France 1.50%
9. United Kingdom 1.31%
10. Australia 1.21%
11. Mexico 1.19%
12. Spain 1.05%
Others 12.23%