In mailcow, I have the newdomain.com domain configured. I need all mail
from this domain was relayed (sent) automatically to another domain
olddomain.com on another server.
That is, mail that arrived at email@example.com was automatically forwarded to
firstname.lastname@example.org. But it is IMPORTANT not to create users on newdomain.com,
which are present at olddomain.com. That is, mailcow is automatically redirected
from one mailbox to another, even if this user is not in newdomain.com.
I apologize for my English and google translate. Thanks to all!