I've just set new Zimbra box, and have problem.
Must migrate users from old mail server to Zimbra server, but every user already have several alternate e-mail addresses like:

user@host1.domain1.domain.com
user@domain1.domain.com
user@domain.com


Zimbra server has name:
host2.domain1.domain.com

and host1.domain1.domain.com is still up and running.

How I can configure Zimbra to handle all this mail domain and all users have same environment once when I switch mail servers...

Any help?