Email lacking access to "Public" folders (not Exchange)?

I’ve seen much discussion about sync of Public folders for Exchange Servers, but what about another server (e.g. MDaemon)?  My MDaemon server has a couple Public email folders (“Spam” and “Non-Spam”) to feed the Bayseian learning machine.  I could see them in Outlook, but not in EMC.  Am I missing it, or is it not supported?