How to enable mail debug for debugging things like Email Alerts set in Rule Actions?
To enable overall Email debugging:
From Administration | Email | Set "Enable Debug Mode?" = true
To enable EmailAction debugging:
1. Add the following as registry variable (boolean) under the Manage Registry Variables dashboard (Administration | Rules & Notifications | Manage Registry Variables) and set it to true:
2. Add debug level to FMS process for the action service from the command line (it is OK while the FMS is running):
fms --add-debug-level com.quest.nitro.service.action.ActionService=2