I have a postfix server with a domain and want to migrate to zimbra the same domain. For the migration I plan to use two servers zimbra. One with the final domain and a temporary another domain. The scenario would look like.
1 domain.com with postfix "a"
1 domain-web.com with zimbra "b"
1 domain.com with zimbra -> final "c"
I have about 400 email accounts.
In order to not losing any email. During two days forward a copy of the mail server called "a" to the server named "b". Next, put online the server named "c" and shut down the server "a" and forward all mails from the server called "b" to the server named "c".
My question is, how I can send all mail from my server "b" to my server "c"?
Thank you very much,