{"kind":"host","input":"mail.colorado.edu","report":{"host":"mail.colorado.edu","checkedAt":"2026-11-03T06:01:55.611Z","a":{"status":"found","values":["136.147.129.27"],"ttl":3600,"via":"Cloudflare","cname":[]},"aaaa":{"status":"absent","via":"Cloudflare","cname":[]},"verdict":"ipv4-only"},"readiness":{"grade":"D","summary":"The website has no IPv6.","reachabilityTested":true,"checks":[{"key":"web","label":"Website over IPv6","status":"fail","detail":"mail.colorado.edu has no AAAA record."},{"key":"mail","label":"Mail servers (MX) have IPv6","status":"fail","detail":"None of the mail servers has an AAAA record.","hosts":[{"host":"inbound-reply.s7.exacttarget.com","ipv6":false}]},{"key":"dns","label":"Nameservers have IPv6","status":"pass","detail":"6 of 6 nameservers checked have an AAAA record, so IPv6-only resolvers can look the domain up.","hosts":[{"host":"a11-66.akam.net","ipv6":true},{"host":"a1-153.akam.net","ipv6":true},{"host":"a2-67.akam.net","ipv6":true},{"host":"a20-65.akam.net","ipv6":true},{"host":"a3-66.akam.net","ipv6":true},{"host":"a22-67.akam.net","ipv6":true}]}]},"receiptId":"pTMkh3xSlG","reused":true,"measuredAt":"2026-11-03T06:01:55.646Z"}