We have a old server which i just struggling to run the latest zimbra. We have new hardware with latest zimbra installed and configured.
I can migrate all accounts to the new server fine. however for a period of 1 month i need to make sure both systems are up and running in parallel.
what i would like to do is have all mail go to zimbraold.example.com then store all mail like normal, but I would also like it to forward mail to the new server (zimbranew.example.com) so for the 1 month period users can get their mail from either server.
I have read the split domain wiki, but that does not deal with this case. Specifically I do not want to set this on a per user basis but on a all mail coming into the server basis.
Anyone have any pointers?