If you were running win2000 (with AD)or better this would be a lot easier. I havn't touched exchange or NT4 in a long while. Having said that what you are looking for is likely to be a winbind + SASL + postfix solution.
A little OT, after doing an eval of exchange 2000 I replaced two of my clients with linux mail servers. Dumped exchange completely. Now we use exim with cyrus providing the imap/imaps connection to the mailbox. We backend all authentication into the domain controller (AD). This doesn't help you right now but if you migrate to AD later on, you may be able to do away with exchange.
Here is an smtp auth howto for postfix: http://postfix.state-of-mind.de/patrick.koetter/smtpauth/
Check the winbind man page or google for more info.
Hope this helps
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Quoting Martin Glazer <[EMAIL PROTECTED]>:
On May 4, 2005 17:35, Gustin Johnson wrote:I have done something similar with exim (backend user lookups into AD), SASL and LDAP. I believe that postfix also supports kerberos, since AD is built around kerberos you could authenticate that way. Though I am not all that familar with postfix, this probably does not help you unless your users have laptops that authenticate to the domain before going home (windows 2000 and later cache the kerberos tickets).
I could probably do it using LDAP as well - will look into this.
What version of exchange? How are users authenticating to your exchange server? (I assumed that AD was being used)
This is on an NT network with Exchange 5.5, so AD is not being used. Not sure what mechanism is used though.
Martin
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