Subscriber unsubscribed

A subscriber stopped being mailable. data.reason says why.

self_service: the reader opted out themselves, either through the unsubscribe link in an email or the RFC 8058 one-click header, or from inside the Commune app.

bounced and complained: forced by delivery telemetry rather than chosen by the reader, so they arrive alongside delivery.bounced or delivery.complained.

The subscriber record survives with its status changed, so bounce and complaint history is kept and a later resubscribe reuses it.

Delivered as a single HTTPS POST to the consumer's registered endpoint, with the message as the JSON request body. Respond 2xx to acknowledge. Anything else, or a timeout, is retried with backoff, so acknowledge fast and do the work afterwards.