From my ip range, libera.chat needs SASL auth, which irker does not supports yet.

roles/certificate_watcher/tasks/main.yml

@@ -26,11 +26,17 @@
     become: true
     become_user: "{{ owner }}"
 
+  - name: Ensure crontab sends email to me
+    community.general.cronvar:
+      user: "{{ owner }}"
+      name: MAILTO
+      value: julien+certificate-watcher@palard.fr
+
   - name: Setup certificate watcher cron
     cron:
       user: "{{ owner }}"
       name: Watch certificates
-      minute: "12"
+      minute: "57"
       hour: "7-23"
-      job: '$HOME/.venv/bin/certificate_watcher -f ~/certificates | while read -r line; do printf "{{ prefix }} \%s" "$line" | irk "{{ dest }}" - ; done'
+      job: '$HOME/.venv/bin/certificate_watcher -f ~/certificates'
   tags: [certificate_watcher]