. -->
New to Centro? See Salesforce working inside Microsoft Teams and Slack. Book a demo
Contact Us
Updated: 23 February 2026

Allowing SMS Unsubscribes

ALERT: SMS in Slack is now deprecated functionality in Centro. This is legacy documentation.

The default behavior of SMS integration is to allow receipts to text "STOP" and unsubscribe from further text messages. Centro does enforce this behavior when using SMS within Slack. However, Centro does not automatically append a footer describing that in order to unsubscribe, the recipient must reply back with "STOP". Recommendations:

  • Always use a template when sending SMS messages. Include in the footer of that template a description like "To unsubscribe, please reply with STOP", or something to that effect.

  • When the recipient replies with STOP, they will receive this message:

  • If a Centro user attempts to send another message to the unsubscribed user, they will receive this error message in Centro:

Not using Centro yet?

Bring a Salesforce process you want to run from Microsoft Teams or Slack. We will show you how it works in Centro.

Book a demo See what Centro does