Hello,
Please confirm EEM is a feasible way to accomplish this and confirm I can trigger it every few minutes.
1. Issue a "show hsrp detail" under the respective interfaces.
2. In the output of the "show hsrp detail", if I find "Standby router is unknown", trigger an email to the support@mycompany.com.
event manager applet monitorhsrp
event timer watchdog time 300 maxrun 9999999