How do I make facebook stop sending notifications to my email?

I made my facebook years ago and I've never been able to figure out how to stop the constant flow of notifications to my email. It started to get out of hand (the email i use for facebook currently has over 7000 unread emails which are all notifications) so i made a new email just for me to use for normal stuff. now i have an iphone and i still use my original email occasionally so my phone beeps everytime i get a stinkin facebook notification. it clutters everything, how do i make it stop?!?!