Have you checked your default email address on your Facebook profile or timeline recently? Chances are, it’s not the one you think. To increase acceptance and use of it’s email service “facebook.com”, Facebook changed the default email address on every profile and timeline to “your email@facebook.com”
Want to change it back, here is how:
1-Click “About” or “Info” (if you still have the old profile) on your profile and scroll down to your email address. Click “Edit” to change them.
2-Click on the circle next to your Facebook email address and change its setting to “Hidden From Timeline”.
3-Click on the circle next to your other email addresses and change their settings to “Shown On Timeline”.
4-Click the Save button at the bottom of the Edit popup.