[tom]

Originally Posted by till

Did you login to the ISPConfig controlpanel with the URL that is specified in the file /home/admispconfig/ispconfig/lib/config.inc.php?

For that case no. I found a strange entry in /home/admispconfig/ispconfig/lib/config.inc.php

http://domain.top.domain.top

It should be

http://domain.top

I changed it. Now it works.

thanks

tom