This hostname is the api surface for the customer-facing endpoints used by mail-platform tools. There's no public homepage — you're meant to land here only via emailed links or tool plugins.
/health — liveness probe/v1/welcome/<token> — set-password page after onboarding/v1/self/password-reset/confirm/<token> — password-reset confirmationIf you reached this page by mistake, you can safely close it.