The problem is that dynamic dns names will always resolve to the box ip even if it changes but the box ip will never resolve to this hostname (unless it's your own dynamic dns service).
In your case, your host test.mine.nu resolves to your box's ip, let's say 1.3.3.7, but if you try to reverse dns the ip 1.3.3.7 you won't get the test.mine.nu hostname.
|