IETF Decides on SPF / Sender-ID issue coverage and discussion on slashdot Is Sender ID Dead in the Water? - No MARID Working Group Consensus coverage and discussion on groklaw MARID Co-Chairs Clarify Consensus Statement MARID to close mailing list thread. Sender ID: A Tale of Open Standards and Corporate Greed? "SPF: SPF vs Sender ID" "Sender Id Types in Different Countries" "Sender Id" Email authentication Spam filtering Microsoft initiatives