From Vernon Schryver:
“Each item in the following list was suggested by the words or actions of people who presented themselves to the IETF or elsewhere as having discovered the FUSSP. Some of the items may seem obscure to those who have not dealt with the IETF.”
http://www.rhyolite.com/anti-spam/you-might-be.html
This list should be required reading for anyone who think they have the “final solution” to spam.