Mail server setup
I'm looking into setting up a mail server with the following features:
1. Scan mail for virii (using ClamAV).
2. Scan mail for spam (using spamd).
3. Relay using SMTP AUTH for "road warriors" (cram-md5 or plain + SMTP TLS).
4. Authentication using system accounts in /etc/passwd with possibility to switch to LDAP.
I'm currently using sendmail with milters for parts 1 and 2.
So far I only skimmed through Postfix and Exim docs and it's somewhat not that quite clear whether
the 3+4 part is at all possible. Has anybody done this on Debian?