I'm trying to help someone with Postfix, and it looks like this one is a few versions behind. They say that they're not sure if it was isntalled Via RPM or a source tarball. This is a RHEL5 server. It's set up to use Dovecot and MySQL. There are RPMs listed as installed (rpm -qa) but I don't know how I can tell what was used to install the currently used set up. (also asking on the Dovecot list)
Thanks Blake
