The email problem is on your end. Some email clients just don't work with the forum.
We needed to know if you purchased a perpetual license, or a subscription to the Creative Cloud. It sounds like you bought a perpetual license. Did you register the software when you installed it? Did you enter the serial number during installation? Did you try to move the software from another computer?
Have you ever had any CS5 programs? Did you uninstall them? If so, did you do it before or after installing CS6?
Have you tried simply registering again at the prompt (and are you sure it is asking you to register, rather than activate)?
The problem was fixed by Adobe Germany.
As a courtesy to other users who may have a similar problem and find this thread looking for an answer, would you mind telling us what was done to solve the problem?