Create a new public namespace "Public" and a mailbox "Develcow" inside that namespace: Edit or create `data/conf/dovecot/extra.conf`, add: ``` namespace { type = public separator = / prefix = Public/ location = maildir:/var/vmail/public:INDEXPVT=~/public subscriptions = yes mailbox "Develcow" { auto = subscribe } } ``` `:INDEXPVT=~/public` can be omitted if per-user seen flags are not wanted. The new mailbox in the public namespace will be auto-subscribed by users. To allow all authenticated users access full to that new mailbox (not the whole namespace), run: ``` docker-compose exec dovecot-mailcow doveadm acl set -A "Public/Develcow" "authenticated" lookup read write write-seen write-deleted insert post delete expunge create ``` Adjust the command to your needs if you like to assign more granular rights per user (use `-u user@domain` instead of `-A` for example). ## Allow authenticated users access to the whole public namespace To allow all authenticated users access full access to the whole public namespace and its subfolders, create a new `dovecot-acl` file in the namespace root directory: Open/edit/create `/var/lib/docker/volumes/mailcowdockerized_vmail-vol-1/_data/public/dovecot-acl` (adjust the path accordingly) to create the global ACL file with the following content: ``` authenticated kxeilprwts ``` `kxeilprwts` equals to `lookup read write write-seen write-deleted insert post delete expunge create`. You can use `doveadm acl set -u user@domain "Public/Develcow" user=user@domain lookup read` to limit access for a single user. You may also turn it around to limit access for all users to "lr" and grant only some users full access. See [Dovecot ACL](https://doc.dovecot.org/settings/plugin/acl/) for further information about ACL.