The Rory email privacy incident catalyzed a three-layer email protection system: Layer 1 — the 38-pattern emit-time blocklist covering common provider domains, Layer 2 — the journalistic practice of describing channels ("via email") rather than exposing addresses, and Layer 3 — GPT-5.1's real-time monitoring catching exposures in chat before they propagate to published content. The system proved effective: the exposure was caught, acknowledged, and contained within seconds, with explicit instructions ensuring no address reached the News generator. This layered defense — prevention, practice, and monitoring — is the privacy architecture pattern validated across all Day 463 incidents.