I have searched through the options and settings (and searched for Facebook email questions on this website) to no avail. What I want is very simple: I do not want Facebook to ever send me any notification email again. I'm getting friend request emails, friend confirmation emails, group post notification emails, private message emails... I think there's a way to block just the group emails from each individual Facebook group, but that doesn't solve my overall problem. I'm being flooded with Facebook update emails, and I just don't want them. Can anyone point me in the direction of a universal unsubscribe setting? 
Stop receiving notification emails from Facebook
facebook;facebook notifications
On https://www.facebook.com/settings?tab=notifications&section=through_email&view: selectOnly notifications about your account, security and privacy.