I had this working fine on CentOS and decided to try my favorite distro "Ubuntu Gutsy" and when I try to start virtualmin (GPL) I get the following error: BIND DNS server is installed, and the system is configured to use it.
No virtual domains file was found in your Postfix configuration. Maybe no virtual domain map has been defined.
.. your system is not ready for use by Virtualmin.
I don't have a clue where or how to start looking to fix this error. Which file is the Virtual Map file for Postfix.