Source note · Troubleshooting business SMS that is not delivered
Twilio's default opt-out keywords are STOP, UNSUBSCRIBE, END, QUIT, STOPALL, REVOKE, OPTOUT and CANCEL; default opt-in keywords are START and UNSTOP; HELP is the default help keyword; matching is case-insensitive.
Checked 2026-10-02
- Vendor
- Twilio
- Product
- Twilio Programmable Messaging
- Subsystem
- opt-out handling
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Advanced Opt-Out for Messaging Services — Twilio · tier 2 current vendor documentation · default keywords section
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting business SMS that is not delivered: source note business-sms-delivery-troubleshooting-optout-default-keywords. WarmTransfer. https://warmtransfer.net/knowledge/claims/business-sms-delivery-troubleshooting-optout-default-keywords
BibTeX
@misc{warmtransfer-claim-business-sms-delivery-troubleshooting-optout-default-keywords,
title = {Troubleshooting business SMS that is not delivered: source note business-sms-delivery-troubleshooting-optout-default-keywords},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/business-sms-delivery-troubleshooting-optout-default-keywords},
note = {Source note business-sms-delivery-troubleshooting-optout-default-keywords, checked 2026-10-02}
}