Dave327 wrote:
The problem started with your e-mail provider - talk to them. Try entering UHH in your address book, especially if your using one provided by your e-mail provider. They may be looking at UHH as spam. Other than that, move to another service.
My suggestion was also going to be to add UHH to your address book. In the past, I have had a couple of situations similar to yours with UHH. Mine were NOT with UHH, though. Turned out that my provider all of a sudden decided it was spam of the uncanned variety. Adding to my address book solved the problem.