i would like to install zimbra 8.0.5 on my centos 6.5 box.

mailserver should be the hoster where i host my domain for over 10 years, that means i will fetch (move) my mails from there and use that mailserver as smarthost for delivering - no direct access to/from the internet for my box! (o.k. not really)

how do i configure the domain-name and mx-record things while installation?
i will make a clean install, just desktop to access it via vnc, no server services running ...
what to put into the hosts-file?