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.
(Note: These instructions reference software that is now possibly much newer with many new or different configuration options. This page is being left up for reference.)