This section contains a number of articles and links to articles about greylisting. You are welcome to submit articles or links to articles to me (contact info on the about page).
The Next Step in the Spam Control War: Greylisting
RFC 821: Simple Mail Transfer protocol - greylisting should work with all RFC complaint MTAs (mail transfer agent).
What's with all these "lists"? What's the difference?
Slashdot | The Next Step in Fighting Spam: Greylisting
Greylisting FAQ (Texas A&M University)
Ny Teknik - Spam er inte laengre nogot problem! (in Swedish)
Greycasting: a distributed heavy duty greylisting implementation
Reduce your intake of spam @ Personal Computer World