I'm looking for suggestions on mailing list software to use on an existing server running Postfix/Procmail. Something relatively simple.

requirements:

• 1 list, < 50 subscribers
• list members dumped in a certain file by a script (being pulled from LDAP or MySQL on another box)
• Handles MIME, images, etc.
• Moderation features
• No subscription/unsubscription - just goes by the file or database.

Mailman is far too heavy-weight, and doesn't seem to play (easily) with Postfix/Procmail.

I'm currently using a PHP script that just receives mail as a user, reads a list of members from a serialized array (file dumped on box via cron on the machine with the MySQL database containing members) and re-mails it to everyone. Unfortunately, we now need moderation capabilities, and I don't quite feel like adding that to the PHP script if there's already something out there that does it.

Thanks for any tips. -Jason