Email as a global communications medium has become so polluted and mistrusted that companies and individuals are moving to other channels such as social media and mobile to regain the ability to have a “trusted” conversation. Facebook, Snapchat, Whatsapp, and other nominal email replacements are inadequate for personal B2C communication and sensitive P2P messaging, not to mention robust B2B communication. A framework called DMARC is an emerging email delivery standard that has shown so much progress and potential that most of the email boxes in the world already support it.”]
Source: https://www.darkreading.com/authentication/why-email-is-worth-saving