ARC Chain Analyzer

Paste a raw email (or just its headers) to see the full Authenticated Received Chain (ARC). Groups ARC-Seal, ARC-Message-Signature, and ARC-Authentication-Results headers by instance, shows the chain validation claim (cv=) at each hop, signing domain, selector, and the authentication results each hop recorded. Useful for diagnosing deliverability when mailing lists or forwarders break SPF/DKIM alignment. Parsing only — signatures are not cryptographically re-verified.