Ideally, you shouldn't really be using the "Suspend all Email Notifications" options all the time. It's only really meant for when you're unable to manage your account, e.g. when you're on holiday, and it may mean that you miss important announcements.
[For example, I think the reason a lot of FMs haven't known about the recent chat events is because they've stopped all e-mail notifications.]
Having said that: there are a few FMs who really do need to use it. One FM recently had to stop all e-mails because they were being redirected to their mobile phone (with resulting charges).
If you're not in that category, however, I personally find that going into "Notifications" and un-ticking the boxes:
"Comments/Replies To Posts I Am Watching", and
"Someone Adds Tag To My Content"
cuts the e-mail input down to manageable levels.