Sent Two-Way Messaging Inbound messaging on Sent has one governing rule: consent is enforced by the platform before the application sees the event. An inbound has already flipped the contact's flag by the time arrives. The application's job is to record it, reflect it in its own UI, and never attempt to send around it. Keyword handling Ten keywords ship as defaults: | Action | Keywords | | --- | --- | | Opt out | , , , , | | Opt in | , , | | Help auto-reply | , | Matching requires the entire trimmed message body to equal a keyword, case-insensitively. "Please stop messaging me" does not match…