[mbristol@uplync.com]

I've attempted the Mailman:ZCS recommended by mmorse above. The config went flawlessly up to the point that it's time to start mailmain. When issuing 'service start mailman', I get the following error:

Traceback (most recent call last):
  File "/var/lib/mailman/bin/list_lists", line 47, in <module>
    from Mailman import MailList
  File "/var/lib/mailman/Mailman/MailList.py", line 49, in <module>
    from Mailman.ZimbraIntegration import ZimbraIntegration
ImportError: No module named ZimbraIntegration
 * Site list for mailman (usually named mailman) missing.
 * Please create it; until then, mailman will refuse to start.

Any thoughts?