- https://en.wikipedia.org/wiki/Anti-spam_techniques
- https://en.wikipedia.org/wiki/Hashcash
- https://en.wikipedia.org/wiki/Sender_Policy_Framework
- https://support.google.com/a/answer/81126?hl=en
- https://en.wikipedia.org/wiki/DomainKeys_Identified_Mail
- http://www.emaildeliveryjedi.com/avoid-spam-filters.php
- https://www.inmotionhosting.com/support/edu/everything-email/spam-prevention-techniques/spf-records-domain-keys-combating-spam
- http://www.zoasoft.com/blog/avoiding-the-spam-folder-dkim
- http://ongoingoperations.com/blog/2014/05/preventing-spam-spf-dkim-dmarc/
Last active
November 25, 2016 10:38
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