>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3510671. --> Reported by: [dpi](https://www.drupal.org/user/81431) Related to !3 >>> <p>Customise Notifier service</p> <p>Add ways to hook in and change which channel a notification+recipient combo is routed to.</p> <p>Do not throw exceptions in some cases where symfony/notifier would normally.</p> <p>Improve tests.</p> <p>Importance/policies are now optional: if a severity is omitted/null then a policy will not be applied.</p>