I'm trying to configure a postfix mailserver to use TLS encryption for SMTP (and IMAP with dovecot, but I haven't gotten to that point yet). It's running on a Fedora 14 machine and I'm using webmin to manage it.
I have a Windows domain with the DC also setup as a Microsoft Certificate Authority and I created a GP that adds the CA as a trusted root ca. I have web services installed so I can go to localhost/certsrv to request new certificates. Anyway, I'd like to use the Microsoft CA to create the Private Key, Public key, and CA Cert for the postfix mail server.
The intent is that all users connecting to the server with SMTP (and later IMAP) will use SSL/TLS and will trust the server because they trust the CA.
Let me know if you need any more info or any suggestions.