Is it something I did? I have not changed Login, email or password. I still receive the PM, just no longer receiving email notification of a PM received.
I had the same issue. I checked my spam and they were all there. I clicked that they were not spam and I think it's okay now. I have received 2 notifications from a PM and one from a thread.
You will have to come back to check this since you aren't getting them.
If after you check your spam you leave another post here, I'll reply to test it.