Control Facebook Notifications E-mail Alert

Facebook will always send you an e-mail massage whenever someone:

Sends you a message, Adds you as a friend, Confirms a friend request, Posts on your timeline, Pokes you, Has a birthday coming up (weekly message), Suggests a friend you might know, Adds a friend you suggested, Joins Facebook after your invite, Tags you on their profile, Tags you in a post, Mentions you in a comment, Comments on a post you were tagged in, Subscribes to your public updates, Posts content (Close Friends list only), Says you are with them in a post, Likes a post you're tagged in, Likes your post, and Subscribes to one of your lists. 

That is why — if you have not made any change to your notifications — you will keep receiving all that junk (unnecessary) massages in your mail box. I don't see any need for e-mail notification in as much as you will still be notified via Facebook account

How to reset Massage Notification:

• Log in to your Facebook and click on Account Settings 
• Click on Notification in the left section of the settings page

• Scroll down the page, in All Notification section click on Edit

•  Uncheck all the check box if you don't longer want to receive any notification e-mail alert or allow ticks for the important notification 

Save the settings, now go to your mail box and delete any Facebook notification massage then observe for some days if you will see any massage from Facebook in your inbox