1. Add a haystack slot to the alarm class(es) being used.
2. Drag the alarm class(es) into the NHaystackService spot where it states to drag the components to add the haystack slot.
3. After doing that, the alarm class(es) will have the haystack slot.
4. From there, click on the blue arrow next to the slot and add some marker tags on which the subscription for alarms is running on.
In this case, the alarm subscription is running on demoAlarm and hvac marker tags. Add those marker tags so that when an alarm is triggered and it has those tags, it will send out an email.
5. Then hit OK to apply and save the settings.
After its saved, when something gets triggered on those tags, it will sent a subscription email