I am trying to redirect mail.myserver.com to Zimbra on port 443 and myserver.com to Apache on port 80 on the same server.

I have installed Zimbra 8 and Apache2 on Ubuntu 12.04
I have turned off http access within Zimbra (zmtlsctl) and stopped Apache2 from listening to port 443 (ports.conf).

Currently to access Zimbra I must type https: before my server name, otherwise it loads my homepage.

From a client's browser I want them to:
type mail.myserver.com and it load the Zimbra web client page via https
type myserver.com and it load my Apache2 homepage via http

Any help would be appreciated.