LDAP is essential if you plan to run a serious mail server. There's very few alternatives to a well-managed LDAP server for your user user directory.
There appears to be a trend towards using SQL databases, particularly MySQL for this. From a programmer's perspective, rather than a sys admin. perspective, I find it easier to wrap my brain around MySQL.
I would assume the big functionality you loose out on through the SQL approach is that all the mail clients don't know how to query it as a user directory (corporate phone/email directory). I imagine someone has probably written an LDAP-to-SQL gateway that should address that.
The structure of an LDAP database is undoubtedly more optimal for storing user profiles and application settings, but those capabilities often go unused in a small setup. As long as your needs stay simple, the SQL approach should also scale up nicely, as lots of effort goes into making SQL servers scale to high volumes.
-Tom _______________________________________________ Boston-pm mailing list [EMAIL PROTECTED] http://mail.pm.org/mailman/listinfo/boston-pm
