Now, if you really want to turn individual emails back on and restore all your original settings, you can do that at any time. Just click on the above link to go your Facebook Notification Settings and Uncheck the box to change your Email Frequency preferences as shown below.
You might as well want to change the Email Notification settings for individual category such as Photos, Groups, Pages and so on. I just woke up to an email from the Facebook Team which says I’ll get less email notifications from them going forward. In fact, they might already have started doing it as I haven’t received a lot of emails from them in the recent past, or from the 25th of August. I used to get an email notification every time someone commented on any one of my Facebook Pages. By the way, here is the screenshot of the email I received in the morning.