Email Alert

Hopefully someone might be able to give me some idea of what might be the issue.  We have setup a template in which one of the metrics is the status of the Listener.  If we manually stop the listener the OEM Listener page for the listener shows a status of down.  In addition looking at the Incident Manager the occurrence of the listener is shown as a event without a incident.  However, the problem is that there is no mail notification being sent about the listener being down.  I have looked at the rule-set and can't seem to find anything wrong - also we have setup other templates for example agent down or database down and we are getting email alerts.  It seems for just this metric we aren't - I have tired removing the rule set and re-creating it but it seems to make no difference.  At this point, I simply not sure what to review or setup.