Go through the following steps to troubleshoot notification problems in Jira:
- Navigate to Administration > System > Notification Helper.
- Select the user that is not receiving the notifications as expected.
- Select the issue for which the user is expected to receive notifications.
- Select the notification event that should trigger the notification.
- Click on Submit to start troubleshooting.
You can also run the Notification Helper tool from the Admin menu while viewing an issue.