If I could, is it possible to get more information on a couple of intricacies of Zimbra?
Here is my problem. My main domain, foo.homelinux.org, is a dyndns domain. This works fine for my wife and kids, but I have had a couple of my emails, e.g. email@example.com, for 10 years or more. So I created a domain in Zimbra, but more and more lately, the mail bounces, because it is not originating from bar.org, but from my cablemodem address. The other problem is that unless a domain is defined in Domains, you cannot set it up as an alias.
What I am wondering is where I can get more information on how to properly set up domains in Zimbra, and whether I can set up individual smarthosting for domains either in the Domains tab or as aliases.