Tried testing from the three major US wireless carriers, ATT, VZW and Sprint. From the three phones, two test text messages were sent. The first to my RC toll free number (877-XXX-XXXX) and the second to my RC local number (619-XXX-XXXX). There were no failure messages sent back to any one of the cell phones with one exception.
On the Sprint phone, the first time I sent a text message to the toll free 877 number I did receive a failure message. I tried to text the toll free number a few more times but never received the failure message again on the Sprint phone.
Here's the one and only failure message received from the Sprint phone to the toll free number, "Message sent to invalid destination. Please check your number and try again. Msg 2127".
A message similar to this is what I am looking for but from all three carriers, to both local/toll free numbers and it would be nice if the failure message was sent back to the cell phone each time a SMS was sent.