I have a machine now, host1.foo.edu. It's a mail/web server and receives mail locally. I want to move mail services off of it onto a zimbra box, host1-mail.foo.edu. The plan was to migrate users one at a time over to zimbra, and then set up a per-user forward on host1 that points to host1-mail.foo.edu. When everyone is migrated over, I was going to change the DNS MX record on host1.foo.edu to point to host1-mail.foo.edu. Can I get zimbra to receive mail for host1.foo.edu also, without creating a separate set of users for that domain? I need to leave the old machine up and running, because it is also my webserver, so I'm relying only on the MX record to send the mail to zimbra..

Does this sound do-able?