{"kind":"host","input":"webmail.transip.nl","report":{"host":"webmail.transip.nl","checkedAt":"2026-11-01T09:00:48.733Z","a":{"status":"found","values":["86.105.244.3"],"ttl":3600,"via":"Cloudflare","cname":["transip.email"]},"aaaa":{"status":"found","values":["2a01:7c8:e100:1::7254"],"ttl":3600,"via":"Cloudflare","cname":["transip.email"]},"verdict":"dual-stack"},"readiness":{"grade":"B","summary":"Works over IPv6, with one gap: its mail servers lack IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"pass","detail":"webmail.transip.nl has an AAAA record and answers on it.","addresses":[{"address":"2a01:7c8:e100:1::7254","result":"answers","port":443}]},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"mail1.transip.nl","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"3 of 3 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"ns0.transip.net","ipv6":true},{"host":"ns1.transip.nl","ipv6":true},{"host":"ns2.transip.eu","ipv6":true}]}]},"https":{"status":"fail","problem":"certificate","summary":"The certificate served over IPv6 at 2a01:7c8:e100:1::7254 isn't valid for transip.email: UNABLE_TO_VERIFY_LEAF_SIGNATURE.","hops":[{"url":"https://webmail.transip.nl/","address":"2a01:7c8:e100:1::7254","status":302,"tls":"valid"},{"url":"https://transip.email/","address":"2a01:7c8:e100:1::7254","tls":"UNABLE_TO_VERIFY_LEAF_SIGNATURE"}]},"receiptId":"EFzhTXr1VV","reused":true,"measuredAt":"2026-11-01T09:00:49.659Z"}