As Thorsen said there are some SF notification changes being made now.
You can opt in to get notified "online" for new posts to your subscribed threads.
Take a look at post #2 from John (z3r010) in http://www.sevenforums.com/vip/28309...-question.html
Right now I'm getting Email and Online notifications for new posts.
Enabling the online notification may help you until your email issue is resolved.
If there is an issue, I think John would want to know so it can be fixed...