This document is meant to document the replacement of a Microsoft Exchange server with a Linux based solution. Currently this information is for Red Hat 6.1 systems as this seems to be the only system with a packaged, working version of the pam_ldap module. If you have a work around for other systems please contact me. The functionality you should expect when configured includes, LDAP address book, POP3 and IMAP4 accounts and mail user management through LDAP. Hopefully this document will expand to cover more features and some more system administration utilities.
The permanent home for this document can be found at http://www.arrayservices.com/projects/Exchange-HOWTO/