The notifications cron job can be disabled.

defaults/main.yml

@@ -34,7 +34,8 @@ mailman_custom_templates:
   - 'it/list:user:notice:probe.txt'
   - 'it/list:user:notice:welcome.txt'
 
-# Documentation that must be followed to configure the social auth providers
+mailman_enable_daily_notifications: true
+  # Documentation that must be followed to configure the social auth providers
 # https://django-allauth.readthedocs.io/en/latest/installation.html
 mailman_use_social_account_providers: False
 mailman_postorius_social_auth_providers:

tasks/mailman.yml

@@ -111,27 +111,26 @@
 
 
 - name: Add the maintenance cron jobs
+  tags: ['mailman', 'mailman_conf', 'mailman_cron']
   block:
     - name: Add a daily cron job that sends digests
       cron:
-          job: "{{ mailman_bindir }}/mailman -C {{ mailman_conf_dir }}/mailman.cfg digests --periodic > {{ mailman_log_dir }}/mailman_cron_digest.log 2>&1"
-          special_time: daily
-          user: '{{ mailman_user }}'
-          name: "Mailman digests"
-          cron_file: 'mailman-digests'
-          state: present
+        job: "{{ mailman_bindir }}/mailman -C {{ mailman_conf_dir }}/mailman.cfg digests --periodic > {{ mailman_log_dir }}/mailman_cron_digest.log 2>&1"
+        special_time: daily
+        user: '{{ mailman_user }}'
+        name: "Mailman digests"
+        cron_file: 'mailman-digests'
+        state: present
 
     - name: Add a daily cron job that sends notifications to the list administrators and list owners
       cron:
-          job: "{{ mailman_bindir }}/mailman -C {{ mailman_conf_dir }}/mailman.cfg notify > {{ mailman_log_dir }}/mailman_cron_notifications.log 2>&1"
-          minute: '0'
-          hour: '7'
-          user: '{{ mailman_user }}'
-          name: "Mailman notifications"
-          cron_file: 'mailman-notifications'
-          state: present
-
-  tags: [ 'mailman', 'mailman_conf', 'mailman_cron' ]
+        job: "{{ mailman_bindir }}/mailman -C {{ mailman_conf_dir }}/mailman.cfg notify > {{ mailman_log_dir }}/mailman_cron_notifications.log 2>&1"
+        minute: '0'
+        hour: '7'
+        user: '{{ mailman_user }}'
+        name: "Mailman notifications"
+        cron_file: 'mailman-notifications'
+        state: "{% if mailman_enable_daily_notifications %}present{% else %}absent{% endif %}"
 
 - name: Install some default templates
   block: