Jun'03: SPF project starts
Oct'03: Microsoft publicizes CallerID with IPR license
May'04: SenderID, merger of SPF & CallerID
May'04: Intellectual Propery disclosure on MARID
Aug'04: Rejection of the SenderID license by
	. Apache Software Foundation (ASF)
	. Debian project (major linux distribution)
	. Larry Rosen, Richard Stallman
	. Lots of OSS developers
Sep'04: USPTO publishes microsoft's patent application
Sep'04: Marid discontinued due to lack of consensus