Facebook’s fancy new email system is overwriting users cell phone address book information with @facebook.com addresses for all their contacts causing emails to go missing or unnoticed.You may or may not realize that you have a Facebook email address. It’s an @facebook.com address you can use to correspond with people on external email accounts from your Facebook inbox. You may not want to use your @facebook.com address but that’s hasn’t stopped Facebook from updating your contact information on the site. They’ve replaced the address you published on the site with your Facebook email address that they’ve created for you.
According to CNet, Facebook users say contacts’ e-mail addresses on phones and personal devices have been altered without their consent — and their e-mail communication is being redirected elsewhere, and lost. If you’ve sent an email to someone and haven’t gotten a response check your contact list and see if their email has been replaced by a Facebook email address. If it has… they might not even know you sent it.
To return to your actual contact preference on Facebook you’ll need to go to your profile page, hide the Facebook.com address from your Timeline, and replace it with another address. Then make sure to go to your Timeline view and edit your contact settings as well.