That's almost right for the hosts file, it should read:
127.0.0.1 localhost.localdomain localhost
the second line you have is correct.
Split DNS should be fairly simple to set-up, a 'straight' DNS set-up can be found in the 'DNS in a Nutshell' post but I don't think there's a how-to on split DNS in the forums. I think there is a link to a google search somewhere on the forums. Have a look around and if you have any problems post again.
Yes, you can run a DNS server on the Zimbra host.
__________________
Regards
Bill
|