Make OpenDMARC cron job email root only on error.

roles/mailserver/tasks/opendmarc.yml

@@ -38,5 +38,4 @@
   file: path=/var/run/opendmarc/opendmarc.dat state=touch owner=opendmarc group=opendmarc
 
 - name: Activate OpenDMARC report cronjob
-  cron: name="OpenDMARC report" hour="2" minute="0" job="/bin/bash /etc/opendmarc/report.sh >> /var/log/opendmarc_report.log"
-
+  cron: name="OpenDMARC report" hour="2" minute="0" job="/bin/bash /etc/opendmarc/report.sh >> /var/log/opendmarc_report.log 2>&1 || tail /var/log/opendmarc_report.log"

roles/mailserver/templates/etc_opendmarc_report.sh.j2

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# ensure this script errors out if any of its steps do
+set -e
+
 DB_SERVER='localhost'
 DB_USER='{{ mail_db_opendmarc_username }}'
 DB_PASS='{{ mail_db_opendmarc_password }}'