Email I receive since I decided to allow that. (I didn't like it cluttering my email so hadn't been doing it for a year or so)

It was only the "new subscribed posts" or whatever that title is below where your messages is on your "my profile" page. Top part is advertisements. Then there are messages. Then its the "new subscribed posts" for all the threads you are subscribed to that have new messages posted to them you have not yet viewed.

So - not the notifications you receive off site, the ones you receive on-site.