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Tip: check out Habeas ( http://www.habeas.com/ ). They use a copyrighted piece of text, with restrictive licensing terms that forbid its use in spam. They've also committed to suing spammers who attempt to subvert this model. Given that, as a result, we can count on mails with this token being non-spam\[\*\], we're happy to give it "bonus points" and allow it through filters. (\*Please\* report spammers who illegally use the Habeas haiku.) |
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\[\*\] Many people sincerely doubt this is going to work. Spammers can trivially add those headers, and there are too many spammers for every one to be chased by legal action. As a result, the headers are largely worthless and it comes back down to a traditional per-IP blacklist based on user reports, with all the problems that entails. The presence of the headers *certainly* doesn't, in my opinion, warrant a score of -8.0 which nullifies the (more useful and accurate) content checks. The Habeas system is far more likely to be abused than used.see http://www.habeas.com/report/ .) |
Some useful links:
- Frugal Marketing: That's not Spam, That's My Newsletter! http://www.frugalmarketing.com/dtb/notspamnews.shtml
- SpamCon Foundation: Best practices for marketers: http://www.spamcon.org/directories/best-practices.shtml
- Bulk e-mail HOWTO: http://spam.abuse.net/marketerhelp/bulk-howto.shtml
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HashCash http://hashcash.org/
which refers back to SpamAssassin in some of their documentation ( http://hashcash.org/faq.html http://hashcash.org/draft-hashcash.txt
). This is a technological solution, while Habeas is a social/legal solution.(EditHint: what other organizations does Spam Assassin give bonus points to ? The Spam Assassin mailing lists ?)