Hi All,
SPF is pointless because everyone wants to stop spammers, a few people
want to stop phishing, and still fewer would like to end forgery.
However you organize in the future is a waste of time - SPF does
nothing to block spammers nor phishing ("From:" header forgery), so
other technologies that do block 'em will eradicate SPF in the near
term.
Effort is best spent leaving SPF and going someplace that solves the
problems everyone is looking to solve.
Kind Regards,
Chris Drake