Spam: Yahoo!’s DomainKeys proposal for sender auth.
I’m in the UK this week, so commenting in detail isn’t too easy right now. But briefly, the big problem I foresee for DK is dealing with mailing lists and forwarders.
I did spot this oddity in the patent license, though:
Yahoo! will grant a royalty-free, worldwide, non-exclusive license under any Yahoo! patent claims that are essential to implement or use any Implementations so that licensees can make, use, sell, offer for sale, import, or yodel Implementations; provided that the licensee agrees not to assert against Yahoo!, or any other Yahoo! licensees of Implementations, any patent claims of licensee that are essential to implement or use any Implementations.
My emphasis. “Yodel”? ;)
But seriously — patents will make implementation of this tricky for open-source projects, unless those terms are extended to allow the license to be transferable and usable indefinitely.
Patents: argh. That’s all I can say for now. :(