I was reading through the wiki, zimbra architecture, internals etc and I can't figure out something.

If I want to scale the installation by placing multiple mailbox servers, is it possible to do something like:

- email account --> mailbox server mapping

or is it only possible to have

- Domain ---> mailbox server mapping

thus having all emails inside a domain mapped to the same mailbox server.

Can you help in clarifying my curiosity a bit