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Below is a list of useful resources related to greylisting and anti-spam in regards to email spam. If you have any suggestions for new links then please reach out to the email address found on our contact page.

  • LWN: Spam blocking with greylisting
  • Greylisting Whitepaper by Evan Harris
  • Nolisting: Poor Man's Greylisting (retrieved from web archive)

Greylisting.org has been referenced as a concept by 50 educational institutions including:

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