I tried to follow this guide to move (all) of my volumes to another location. https://mailcow.github.io/mailcow-dockerized-docs/u_e-dovecot-vmail-volume/
In my case /opt/mailcow-dockerized/volumes/...

It does not work with the “migration” explained in the documentation and not with a fresh installation.
Error message is: ERROR: for postfix-mailcow Cannot start service postfix-mailcow: error while mounting volume '/var/lib/docker/volumes/mailcowdockerized_rspamd-vol-1/_data': failed to mount local volume: mount /opt/mailcow-dockerized/volumes/mailcowdockerized_rspamd-vol-1:/var/lib/docker/volumes/mailcowdockerized_rspamd-vol-1/_data, data: bindreboo: no such device
In my case the whole dir /opt/mailcow-dockerized/ is already mounted from device /dev/vdb1 via mount /dev/vdb1 /opt/mailcow-dockerized

My docker-compose.override.yml looks like this:
version: '2.1' volumes: vmail-vol-1: driver_opts: type: none device: /opt/mailcow-dockerized/volumes/mailcowdockerized_vmail-vol-1 o: bind mysql-vol-1: driver_opts: type: none device: /opt/mailcow-dockerized/volumes/mailcowdockerized_mysql-vol-1 o: bind redis-vol-1: driver_opts: type: nonels device: /opt/mailcow-dockerized/volumes/mailcowdockerized_redis-vol-1 o: bind rspamd-vol-1: driver_opts: type: none device: /opt/mailcow-dockerized/volumes/mailcowdockerized_rspamd-vol-1 o: bindreboo postfix-vol-1: driver_opts: type: none device: /opt/mailcow-dockerized/volumes/mailcowdockerized_postfix-vol-1 o: bind crypt-vol-1: driver_opts: type: none device: /opt/mailcow-dockerized/volumes/mailcowdockerized_crypt-vol-1 o: bind mysql-socket-vol-1: driver_opts: type: none device: /opt/mailcow-dockerized/volumes/mailcowdockerized_mysql-socket-vol-1 o: bind sogo-userdata-backup-vol-1: driver_opts: type: none device: /opt/mailcow-dockerized/volumes/mailcowdockerized_sogo-userdata-backup-vol-1 o: bind sogo-web-vol-1: driver_opts: type: none device: /opt/mailcow-dockerized/volumes/mailcowdockerized_sogo-web-vol-1 o: bind solr-vol-1: driver_opts: type: none device: /opt/mailcow-dockerized/volumes/mailcowdockerized_solr-vol-1 o: bind vmail-attachments-vol-1: driver_opts: type: none device: /opt/mailcow-dockerized/volumes/mailcowdockerized_vmail-attachments-vol-1 o: bind