Just for those that are interested, I was googleing around for something
completely different and stumbled across this 'how-to'.
http://www.flatmtn.com/computer/Linux-LDAP.html
description from the above link:
Note: The following is part of a series of steps to setup an email server
using Exim 4.x, with imap and webmail access. It will use winbind to get user
information from an NT server. If you found this page via a search engine it
may not cover what you need or you may need to start at the beginning to
understand everything I have done.
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--EAL--
