> I had thought to use qmail, vpopmail, courier-imap to handle the email > services. If there are other choices that are either easier to > implement or offer advantages I haven't thought of, please let me > know.
I can't comment on LDAP, but you may like to consider using MySQL in some capacity.. we run qmail and some patches to let it run virtual domain hosting from a MySQL database.. it's been running beautifully for many months now with POP3, IMAP, webmail and all using Maildirs... There's even SMTP relaying permitted if someone logs in using ESMTP with their mail user/password... - much tidier than kludgy 'POP before SMTP' solutions.. I was just thinking that you could have each installation to point to a MySQL master server on another machine or similar... Of course, this applies to mail only, but I'm sure there's a PAM module for mysql that shell accounts could authenticate to...
