Magic (aka automating email authentication) can fix your email 

Terry Zink of Microsoft made a great case for automating email authentication with a spectacular card trick that got everyone’s attention at the start of his talk on “Taking the hassle out of email authentication.” He convincingly illustrated science fiction writer Arthur C. Clarke’s third law: “Any sufficiently advanced technology will be indistinguishable from magic.” He believes that the reason why so many people do not implement email authentication is that it is difficult to do right. Automating SPF, DKIM and DMARC set-up is the solution. While there is an additional cost to the service provider for setting up the automation systems, it reduces errors, enforces compliance and, Zink argues, is the only way email authentication will take off in the long run.