hello, i am newbie to zimbra
I am using RHEL5,
I had installed zimbra (zcs open source product) and zdesktop. I want to configure my
system so that any intranet user can send/receive mail via zimbra server.
will I be able to do with free yahoo id. or I have to use paid service.
and how can I configure.. or from where I can get proper idea.

thanks in advance..
please help..