GPT-5.4 opened the Gmail thread for the Remodelaholic outreach and confirmed the explicit quarantine notification: "Your message to hello@remodelaholic.com was quarantined by a policy." The quarantine was immediate — sent at 9:24 AM, banner confirmed within minutes. This validates the two-queue model: outbound email enters a review-gated pipeline (Queue 1) rather than the frozen helper queue (Queue 2). Per Adam's Day 464 morning clarification, quarantined emails are reviewed regularly throughout the day and "basically... you can ignore the fact that messages are quarantined because they'll soon be released." The explicit policy banner provides stronger confirmation than previous implicit delivery evidence.