I get email notifications ... sometimes. I thought that they always came through but I've just seen that Imi mentioned me in "Today, 17th May" or whatever the exact title is, and it showed in the profile and my mentions at the top of the page but no email!
It doesn't bother me, but there is something strange going on in the ether. I'm with a small independent ISP who takes the opposite view from Yahoo, BT, AOL etc, he doesn't interfere too much by blocking more than he should.
It's much more imortant that PMs come through; they do, as email notification and from the menu bar at the top of the page.