Why should SPF succeed when similar proposals have failed in the past?
The spam problem was never as bad in the past as it is now. People are willing to put up with a lot more change and pain. People who have shown interest in supporting SPF include Qualcomm (makers of Eudora), Tim O’Reilly (publisher of geek books), SpamAssassin, ActiveState (makers of PureMessage), MailArmory, Declude JunkMail, and others.