I believe the issue is that the send test email program is not looking for a Control.On. I had a similar issue with another program (to reboot my raspberry) that I could not get to run from the wizard - I posted the question but did not get a response. So I re-wrote the reboot program (see attached) to respond to the Control.On - basically I just wrapped the program code in a WebServiceCallReceived procedure, checking for Control.On. You could edit the trigger and program sections of the send test email program to include this feature. Hopefully, someone else will respond with a better solution.