Copying everything over almost works!
Weasel by Peter Moylan works and works well in the OS/2 world, but after ‘xcopying’ everything from the old server to the new would not work. Changed the router to point all traffic to the new server, and incoming mail worked like a charm. The same could not be said for retrieving mail.
Got down to doing the telnet thing [telnet xxx.yyy.zzz.aaa 110] and attempting a login to see if there was any mail. It failed every time, and it did not matter what account or domain I was using.
Found It!
The answer is that you have to allow the local address(es) (after all, I was attempting to retrieve email from a local machine) that Weasel will talk to. Now that I have this resolved, time to let it run out of the rack for a day, then BAM! and shutdown the old energy hog.