Here's something I stumbled on while writing my GW8 Upgrade Guide:
The new GroupWise 8 MTA opens a SOAP connection (for administrative purposes) on port 7161. If you intend to run more than one MTA on any particular server, you must set a unique SOAP port for the additional MTAs. This cannot be done in ConsoleOne, but must be configured in your MTA startup file. The default port is 7161. For each additional MTA you should set an alternative port.
- NetWare/Windows: /soapport-7162
- Linux: -- soapport 7162
This is undocumented as far as I can tell.
Caledonia Network Consulting:
Disclaimer: As with everything else at Cool Solutions, this content is definitely not supported by Novell (so don't even think of calling Support if you try something and it blows up).
It was contributed by a community member and is published "as is." It seems to have worked for at least one person, and might work for you. But please be sure to test, test, test before you do anything drastic with it.