You sent a message (message SID: SMXXXXX) from a Toll-Free number to a mobile subscriber in USA or Canada. Twilio requires all Toll-Free numbers to go through a verification process. The Toll-Free number you sent from has not been verified through the required verification process.
*Your toll-free number has not been Verified to allow sending of traffic in USA and Canada.
*Your toll-free verification submission was rejected.
Please refer to this Support Article for the process to get your Toll Free number verified.
Effective Nov 8th, 2023, messages on restricted toll-free phone numbers are blocked. Effective Jan 31st, 2024, messages on pending toll-free phone numbers are blocked.
Toll-Free best practices can be found here