I had entered a fully qualified Internet name in my InternalServer server document. Took that out and now I don't get the resolver error. However, I still get this message
Router: No messages transferred to CN=WEBSERVER/O=WEBORG (host CN=WEBSERVER/O=WEBORG) via SMTP: The remote server is not a known TCP/IP host
The WebServer is running and receiving mail and transferring it to InternalServer that delivers it to the correct user.
However, when sending from a client connected to InternalServer the InternalServer displays the message above.
The connection Document of Internal server points to WebServer (I changed the Optional Address for WebServer to it's actual IP Address).
There have been no changes to the WebServer side.
I can replicate from the Internal Server to The WebServer so my connection document from Internal to WebServer would appear to be correct.
if from the internal Server Admin Console I issue the command:
replicate webserver/weborg names.nsf
the replication works fine and the names.nsf on the WebServer is updated with the latest changes.
From a client I can open a DB on WebServer.
So I must have changed something on the internal server inadvertently but I can't for the life of me figure out what it might have been.