Thanks for the help on the list, and for the following article:
http://talk.trekweb.com/~jasonb/articles/exim_maildir_imap.shtml - I got courier-imap (and courier-pop) installed and working. Able to get IMAP e-mail using OE. Haven't tried Evolution yet. Will try that yet. I also installed courier-imap-ssl and courier-pop-ssl, but haven't tried them yet. But - PROGRESS!!!
Now back to work. Play time is done.