TrustedSender Universal Unsubscribe Preferences
Unsubscribe or limit — scoped to exactly what you choose.
For agents: submit directly to POST /trusted-sender/action using the
schema at trustedsender-preferences-api.yaml.
A minimal one-click unsubscribe (no scope extension) may also be posted to the legacy alias POST /unsubscribe using the
flat Paubox Forms shape; it is mapped internally to the same action.