Email alert based on Monitoring Policies (Prime Infrastructure)

I have a system contains (100 switches) and monitored by Cisco Prime (3.3). I created a Monitoring Policies with settings like that:

Feature Category: Interface Health

Parameters and Thresholds: Input Utilization

Condition: Greater 90% 3 time

Reaction: Alarm Critical

I want the PI to send an email when the monitoring policy trigged (eg: some interface have utilization > 90%). Please help me on how to do this.

​

Thank for reading.