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Origin of E-Mail Spam - Where does Internet spam come from?
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Origin or source of spam refers to the geographical location of the computer from which the spam is sent; it is not the country where the spammer resides, nor the country that hosts the spamvertised site.
Due to the international nature of spam, often the spammer, the hijacked spam-sending computer, the spamvertised server, and the user target of the spam are all located in different countries.
In terms of volume of spam: According to Sophos, the major sources of spam in the second quarter of 2006
(April to June) were the United States (the origin of 23.2% of spam messages), followed by China (20.0%)
and South Korea (7.5%). When grouped by continents, spam comes mostly from Asia (40%), Europe (27%), and
North America (26%).
In terms of number of IP addresses: The Spamhaus Project (which measures spam sources in terms of number
of IP addresses used for spamming, rather than volume of spam sent) ranks the top three as the United
States, China, and Russia, with South Korea placed at #6 behind Japan and Canada.
In terms of networks: As of 5 January 2007, the three networks hosting the most spammers are Verizon,
ServerFlo, and AT&T (operating as sbc.com, a vestige of its former corporate identity). Verizon inherited
many of these spam sources from its acquisition of MCI, specifically through the UUNet subsidiary of MCI,
which Verizon subsequently renamed Verizon Business.
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