All questions related to installations, configurations and maintenance of Advanced Host Monitor (including additional tools such as RMA for Windows, RMA Manager, Web Servie, RCC).
You may setup "File/Folder Availability" test using %NewestFile% variable, add "Send e-mail" action into action profile assigned to the test and use <<IncludeFile=%FileName%>> directive in e-mail template.
No, RMA cannot send file to HostMonitor...
If HostMonitor does not have access to the file, I think you need some external application that will send e-mail. HostMonitor can tell RMA to start this application using "Execute external program" action.