- General Guidelines – These guidelines can be useful if you haven't yet sent out your email(s), and want to keep the scores low (or negative) to avoid false-positive problems.
- Fixing FPs – Your email was flagged as a spam – how to avoid this next time
- Newsletter Aids – Your newsletter is confirmed opt-in / double opt-in, never spams, and you want to gain some negative scoring traits.
- Other Resources – Where else can you look for guidance?
These guidelines can be useful if you haven't yet sent out your email(s), and want to keep the scores low (or negative) to avoid false-positive problems.
- Return Path ( http://www.returnpath.net/ )
Return Path’s Sender Score Certified is an email accreditation program (or "whitelist") with strict standards for both infrastructure and practices. Return Path also operates the Sender Score Safelist, with somewhat different criteria.
Given that, as a result, we can count on mails from these programs being non-spam, we're happy to give it "bonus points" and allow it through filters.
DNSWL.org provides a Whitelist of known legitimate email servers to reduce the chances of false positives while spam filtering.
Please report any spam that is given bonus points for either of these services to the respective service.
- HashCash ( http://hashcash.org/ )
See http://hashcash.org/faq and http://hashcash.org/draft-hashcash.txt.
This is a technological solution, while Bonded Sender is an economic solution and Habeas is a legal solution. Hashcash may not be appropriate for large mailing lists, as it requires substantial computational power to send each email.
Where else can you look for guidance?
- 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