First of all you need to activate DNS management, please follow this howto to do it
Now, please check that domain to forward use our nameserver. To check nameserver follow this howto.
Check that you're using that nameservers:
Now all we need to do is create wildcard CNAME like
* CNAME 14400 target_domain.com
For example, if we want redirect domflow.net to domflow.it, we need to setup record like this: