Add public folder info

docs/u_e-dovecot-public_folder.md

@@ -0,0 +1,30 @@
+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, 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.
+
+See [Dovecot ACL](https://doc.dovecot.org/settings/plugin/acl/) for further information about ACL.

mkdocs.yml

@@ -1,4 +1,4 @@
-site_name: "mailcow: dockerized documentation"
+site_name: 'mailcow: dockerized documentation'
 site_url: https://mailcow.github.io/mailcow-dockerized-docs/
 copyright: 'Copyright © 2020 André Peters'
 repo_name: mailcow/mailcow-dockerized
@@ -78,17 +78,18 @@ nav:
   - 'Unbound':
       - 'Using an external DNS service': 'u_e-unbound-fwd.md'
   - 'Dovecot':
-      - "(Re-)Enable any and all authenticated ACL settings": 'u_e-dovecot-any_acl.md'
-      - "Expunge a User's Mails": 'u_e-dovecot-expunge.md'
-      - "Customize/Expand dovecot.conf": 'u_e-dovecot-extra_conf.md'
+      - 'Enable "any" ACL settings': 'u_e-dovecot-any_acl.md'
+      - 'Public folders': 'u_e-dovecot-public_folder.md'
+      - 'Expunge a User's Mails': 'u_e-dovecot-expunge.md'
+      - 'Customize/Expand dovecot.conf': 'u_e-dovecot-extra_conf.md'
       - 'Mail crypt': 'u_e-dovecot-mail-crypt.md'
       - 'More Examples with DOVEADM': 'u_e-dovecot-more.md'
       - 'Move vmail volume': 'u_e-dovecot-vmail-volume.md'
       - 'IMAP IDLE interval': 'u_e-dovecot-idle_interval.md'
       - 'FTS (Solr)': 'u_e-dovecot-fts.md'
   - 'Nginx': 
-     - "Custom sites": 'u_e-nginx.md'
-     - "Create subdomain webmail.example.org": 'u_e-webmail-site.md'
+     - 'Custom sites': 'u_e-nginx.md'
+     - 'Create subdomain webmail.example.org': 'u_e-webmail-site.md'
   - 'Redis': 'u_e-redis.md'
   - 'Rspamd': 'u_e-rspamd.md'
   - 'SOGo': 'u_e-sogo.md'