Why Facebook swapped your email address to YourName@facebook.com (and how to switch it back)
The Plain Dealer: Over the weekend, Facebook changed the email address on everyone’s profiles to @facebook.com addresses. One side result of this is that if you’re used to getting email via Facebook at your Gmail or Yahoo address, it would now go to a Facebook.com account that you don’t check, said Thomas Siu, chief information security officer.