Hello, i have en .be domain registered elsewhere, now with use of a free hostname at dynu en where i have my .be domain i forward to that the free dynu hostname, i have a web server and mail server running on it, this way it works.

When is try to use my own domain directly at dynu, i always get unauthorised access , what am i doing wrong ? Something with using wrong dns config somewhere ? Im new to this

Any help very much appreciated