You can disable an instance of a custom email alert, such as when your organization temporarily does not require its use. When you disable an instance of an alert, users assigned to the instance do not receive alerts based on the instance. To disable an instance of a custom email alert, select it on the Manage alert definition tab of the email alert record and click Disable.
After you disable an alert instance, you can enable it to resume its use. To enable an instance of a custom email alert, select it on the Manage alert definition tab of the email alert record and click Enable.