Multiple domains
You may have several domains assigned to your Internet connection. If you have several domains enter all of them into the menu Settings=>Mail Server=>General tab and divide them by semicolon.
Issues with multiple domains
There are two ways to arrange multiple domains assigned to your network:
In this scenario you have to have more public IP addresses mapped to the Interface used by WinRoute for Internet connections. Then you use more port mapping settings - one for each IP address - with the same destination IP address of the WR computer.
There are no special settings required other than to set up port mapping for protocol TCP on port 25 to the local IP address of your WinRoute computer.