I’m aware of ImapSync.
Does MailCow, however, offer its own way of migrating all the emails from one server to the other?
Preferably, as complete as possible: settings, mailboxes, domains….
Meaning, I won’t mind to pack and then copy the directories over to the other server. My concern is restoring and running all that on the other server, and whether this is supported by Mailcow at all.