I would like to offload mail processing onto its own server in my cluster so that it is no longer on my Virtualmin system. I have already set up SpamAssassin on this other machine, following the given documentation, but I do not want to have to install Virtualmin GPL on the second machine just to set up Clam antivirus. Is there a way I can do this without installing Virtualmin GPL?
Also, how can I move the other mail components (Postfix, Dovecot, etc.) to this second server? Both machines mount volumes from a central Gluster file server that contain /home and other folders.
Basically I want the first machine to run Virtualmin, Web, and DNS only; nothing else.