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MessageLevel
The company that invented true Message Level Authentication for e-Mail. Provides an overview of the concept, product descriptions, how to get it for your organization and how to become a partner.
http://www.messagelevel.com
Messagelevel.com ~
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Spam Vampire
Aims to educate how spammers pay for bandwidth and how spam victims can fight back by endlessly loading their graphics to cost spammers money. Includes examples and customizable pages a victim can tailor to target specific spammers.
http://thescambaiter.com/antispam/
Thescambaiter.com ~
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Wikipedia - CAPTCHA
Explains how captcha features can keep spammers from signing up for certain accounts online, such as email or weblogs. Explains how the system can be circumvented as well.
http://en.wikipedia.org/wiki/CAPTCHA
Wikipedia.org ~
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