I recently shared my thoughts with Dark Reading on why email is worth saving. In the piece, we ask 'What if an Internet-scale, federated policy, authentication, and enforcement framework for trusted email delivery were available?' It is, it's called the DMARC specification, and we should be using it.
Here's a link to the full story:
http://www.darkreading.com/endpoint/authentication/why-email-is-worth-saving/a/d-id/1315682
And as follow up, here's more on how Easy Solutions is supporting DMARC: http://newblog.easysol.net/detect-monitoring-service-upgraded-offers-dmarc-saml-compatibility/