virtualmin with postfix+mysql

First of all, apologies for my english.

I have installed a server with diferents services. I’ve configured posftfix and courierIMAP with Mysql for virtualdomains. I’ve other services too, like apache with virtual domains, or proftpd
I’d like to manage all of these through VIRTUALMIN but I don’t know how it does.

Any solution??
Any comentary??
Anybody helps me??