yesterday I have migrated my mailcow instance to a new server. I have done this by making a backup of all data using the backup_and_restore script, installing an entirely new instance of mailcow-dockerized on the new server, setting everything up and restoring the previously taken backup using the same script.
Everything is working fine, I can send and receive mails as usual with one exception. All mails and folders stored in the backup seem to have been migrated to the new instance as can be seen at Configuration > Mailboxes > Message #. They can however not be seen in any mail client (including SoGo). Only mails that have been received on the new server are synchronized and visible in mail clients.
Is it necessary to also migrate the docker images as is shown in the migration guide? I assumed that it isn’t because of the tip stating that you could also use the backup_and_restore script.
I hope someone has an idea to what went wrong here, thanks a lot in advance!