This idea has been merged into another idea. To comment or vote on this idea, please visit CUSTCOM-I-3269 Process "STOP" requests for SMS API.
By law in the US, we must allow recipients to opt out of text messages. RingCentral does not have a feature to allow this.
When a recipients texts STOP, they should be blocked so that the app can no longer send them a message unless they text START or UNSTOP