Twilio Now Supports Unified Opt-Outs across RCS, SMS, and MMS channels

Twilio Programmable Messaging automatically unifies opt-out management across RCS, SMS, and MMS channels.

When an end-user replies with any opt-out keywords (such as STOP, CANCEL, or UNSUBSCRIBE etc) to an RCS message, Twilio automatically enforces that opt-out for all future SMS or MMS messages sent from that same Sender or Messaging Service. Conversely, opt outs on SMS or MMS will automatically block future RCS messages.

Any attempt to message an opted-out user across these unified channels will now fail and return Error 21610.

This cross-channel compliance is active by default to protect your sender reputation, prevent accidental messaging on fallback channels, and requires no code changes to implement.

For more information, read our documentation.