スパム対策はWebサイトを狙え

スパムから誘導されるWebページについては、1つのWebサイトが多数をホスティングしているケースが多い。
だから、メールのブロックだけでなく、リンク先のWebサイトをやっつけることが、スパム削減の有効手段になる。

「スパムで宣伝されている時計や男性強化製品」 - やっぱり、日本とは内容の傾向がぜんぜん違うんだなあ。

U.C. researchers: Take antispam fight to the Web - Network World

They concluded that while spammers may use many different servers to send out their e-mail, it's a different story when it comes to hosting the Web page that sells the watches or male enhancement products featured in the spam.

The U.C. researchers monitored over 1 million spam messages over a one-week period late last year, tracing them back to more than 36,000 URLs. Using a data analysis technique called image shingling, they were able to identify 2,334 distinct spam campaigns, hosted on 7,029 computers.

Previously used by search engines, image shingling can break down a screen shot of a Web page and analyze its graphical elements.

Researchers found that nearly 40% of the time the spammer's Web site was also being used by another spam campaign, suggesting that these machines are often rented out to more than one spammer.