During last update of docker-mailcow (update.sh script) I got the following message - and also in subsequent update runs:
You seem to have modified the /etc/docker/daemon.json configuration by yourself and not fully/correctly activated the native IPv6 NAT implementation.
Where is that daemon.json - is that the mailcow.json mounted into the containers?
What option do I have to enable? The mail server got IPv6 support and its own IPv6 address.