Later today, Facebook is widely predicted to announce a new email system for its 500 million users. Craig Newmark of Craigslist fame is already predicting that a Facebook email service will go further than being a Gmail-killer, and actually raises hopes of a spam-free future too. Newmark: ‘You might tell Facebook email to only accept email from people with Facebook-verified identities. You might have different levels of email priority, from friends, fans, friends of friends, and so on.(People might link their outside email addresses with their Facebook profiles)”]
Source: https://grahamcluley.com/will-facebook-email-kill-off-spam-far-from-it/