{"success":true,"data":{"id":"ipv6-no-reputation-no-dkim","label":"IPv6 sender, no DKIM/SPF pass (reputation-bypass)","description":"Sender connected over IPv6 but the message has neither DKIM=pass nor SPF=pass in the Authentication-Results header. Spamhaus and other reputation providers have notoriously thin IPv6 coverage — attackers route through IPv6 specifically to escape DNSBL lookups. Combined with no authentication pass, this indicates a deliberate reputation-bypass attempt or an unauthenticated brand-new origin.","tier":"danger","category":"header","isThin":false}}