NewsForge: Why Microsoft's Sender ID Patent Should Not Be Granted

"ISP owner Robert Craddock liked Microsoft's recent Sender ID antispam proposal and patent application so much that he came up with a nearly identical system--except he did it long before Microsoft made its version public. In fact, he started using the system he now calls Mail-Block back in 1998.

"In May of 2003, Craddock offered his system to Microsoft, which rejected it--and the concept itself--in writing, not long before unleashing Sender ID..."

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