Error 63015

Product: Programmable SMS

ERROR - 63015

Channel Sandbox can only send messages to phone numbers that have joined the Sandbox

Channel Sandbox can only send messages to phone numbers that have joined the Sandbox

Possible Causes

This message failed to be delivered to the user because it was sent from a Sandbox to a phone number that has not joined your Sandbox

Possible Solutions

Instruct the recipient to join your Sandbox by sending the join phrase or keyword shown on the Sandbox page in your Twilio Console.