Minimal config with only mail and web and git hosting. So disable z-push backend CalDav and CardDav integration for now.

roles/mailserver/templates/usr_share_z-push_backend_combined_config.php.j2

                 'i' => array(
                     'name' => 'BackendIMAP',
                 ),
-                'd' => array(
-                    'name' => 'BackendCardDAV',
-                ),
-                'c' => array(
-                    'name' => 'BackendCalDAV',
-                ),
+                //'d' => array(
+                //    'name' => 'BackendCardDAV',
+                //),
+                //'c' => array(
+                //    'name' => 'BackendCalDAV',
+                //),
             ),
             'delimiter' => '/',
             //force one type of folder to one backend
                 SYNC_FOLDER_TYPE_WASTEBASKET => 'i',
                 SYNC_FOLDER_TYPE_SENTMAIL => 'i',
                 SYNC_FOLDER_TYPE_OUTBOX => 'i',
-                SYNC_FOLDER_TYPE_TASK => 'c',
-                SYNC_FOLDER_TYPE_APPOINTMENT => 'c',
-                SYNC_FOLDER_TYPE_CONTACT => 'd',
-                SYNC_FOLDER_TYPE_NOTE => 'c',
-                SYNC_FOLDER_TYPE_JOURNAL => 'c',
+                //SYNC_FOLDER_TYPE_TASK => 'c',
+                //SYNC_FOLDER_TYPE_APPOINTMENT => 'c',
+                //SYNC_FOLDER_TYPE_CONTACT => 'd',
+                //SYNC_FOLDER_TYPE_NOTE => 'c',
+                //SYNC_FOLDER_TYPE_JOURNAL => 'c',
                 SYNC_FOLDER_TYPE_OTHER => 'i',
                 SYNC_FOLDER_TYPE_USER_MAIL => 'i',
-                SYNC_FOLDER_TYPE_USER_APPOINTMENT => 'c',
-                SYNC_FOLDER_TYPE_USER_CONTACT => 'd',
-                SYNC_FOLDER_TYPE_USER_TASK => 'c',
-                SYNC_FOLDER_TYPE_USER_JOURNAL => 'c',
-                SYNC_FOLDER_TYPE_USER_NOTE => 'c',
+                //SYNC_FOLDER_TYPE_USER_APPOINTMENT => 'c',
+                //SYNC_FOLDER_TYPE_USER_CONTACT => 'd',
+                //SYNC_FOLDER_TYPE_USER_TASK => 'c',
+                //SYNC_FOLDER_TYPE_USER_JOURNAL => 'c',
+                //SYNC_FOLDER_TYPE_USER_NOTE => 'c',
                 SYNC_FOLDER_TYPE_UNKNOWN => 'i',
             ),
             //creating a new folder in the root folder should create a folder in one backend

site.yml

   become: True
   gather_facts: True
 
+  # This is what I'm using on my minimal web & mail server
   roles:
     - common
     - blog
     - mailserver
     - webmail
-    - news
-    - nextcloud
     - gitea
-    - ircbouncer
-    - xmpp
-    - matrix
-    - mastodon
-    - iot
-    - vpn
-    - monitoring  # Monitoring role should be last. See roles/monitoring/README.md
+  #  - vpn
+    - monitoring
+
+  # These are all roles in one
+  #roles:
+  #  - common
+  #  - blog
+  #  - mailserver
+  #  - webmail
+  #  - news
+  #  - nextcloud
+  #  - gitea
+  #  - ircbouncer
+  #  - xmpp
+  #  - matrix
+  #  - mastodon
+  #  - iot
+  #  - vpn
+  #  - monitoring  # Monitoring role should be last. See roles/monitoring/README.md