He has the power.  All mail WILL go through a single Miscrosoft
server that will charge everyone 40 cents for each mail message.
Spammers won't be able to afford it.  Problem solved.  Won't
need SPF because there will be only one mail server to read
your mail from and to relay mail.

The 1000000 users that aren't running microsoft
and not using the server can spam each other all they want.