Stop all the emails from facebook
Step 1:
Go to www.facebook.com/settings and click notifications
Step 2
Click edit on e-mail settings and click see all if you see this (It may not appear in your account)
Step 3
Click the second option
(Only notifications about your account, security and privacy)
Thats all. Now you have unsubscribed from all the emails from facebook except the mails about changing your password and other security settings.