selfManagedOptOutsEnabled

When set to false, an end recipient sends a message that begins with HELP or STOP to one of your dedicated numbers, AWS End User Messaging SMS and Voice automatically replies with a customizable message and adds the end recipient to the OptOutList. When set to true you're responsible for responding to HELP and STOP requests. You're also responsible for tracking and honoring opt-out requests. For more information see Self-managed opt-outs