I was just wondering if you can run multiple domains on the same machine. I am working with a church that is interested in having shared contacts and calendars integrated in email. The problem is that the costs of hosting a server just to run email is tough to justify for them. I have another church that I know could also use it. Through sharing the costs of a dedicated server, it would then make a lot more sense especially since we are talking about a very low number of users here. Can you setup two "domains" or "environments" in Zimbra so that you are only running one instance of Zimbra, but users from the respective churches only share info with other individuals in their organization?