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- 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
Note on Habeas above - Habeas may have laudable ideas, but in practice, EVERY e-mail I receive with a Habeas header is in fact Spam - I haven't yet actually given it ia positive point score on my machine, but I would certainly recommend all users to reduce it to zero, so in practice, getting a Habeas license will be not only expensive, but probably useless!