I just sent a message from my computer to MYPHONENUMBER@... and it appeared on my iPhone a few seconds later. I replied to that text message and immediately got a "Not Delivered" notice on my iPhone's screen. When I tapped that notice, an option popped up to "Try Again" or "Send to Email Address." Upon selecting the latter, entering a reply, and sending, I saw a notice on the screen saying "Sent to Email Address." Seconds later I got an email on my computer with the reply from my iPhone. The "From: address on the email was MYPHONENUMBER@.... I have an (old) iPhone 4S.
The only hurdle I see remaining is getting MYPHONENUMBER@... signed up to be able to send to Groups.io.
Jim H
Received from Brett Marchand at 8/22/2018 06:01 PM UTC:
toggle quoted message
Show quoted text
Here is where I'm at with it now. The incoming message from the alerting device is currently working to send the initial alert message to <>groups.io, which is sending it out the the members. I then received the mms/text message on my AT&T phone. The problem occurred on the reply from the phone back to <>groups.io. It was never received back to the group messages.
Brett