{
    "ok": true,
    "domain": "umich.edu",
    "generated_at": "2026-08-08T17:55:20-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 86,
        "label": "Good",
        "categories": {
            "dns": 95,
            "mail": 90,
            "security": 100,
            "network": 70,
            "availability": 60
        },
        "category_weights": {
            "dns": 25,
            "mail": 20,
            "security": 25,
            "network": 10,
            "availability": 20
        },
        "items": [
            {
                "category": "dns",
                "title": "IPv4 (A)",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0,
                "detail": "2 IPv4 address(es) detected."
            },
            {
                "category": "dns",
                "title": "IPv6 (AAAA)",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0,
                "detail": "2 IPv6 address(es) detected."
            },
            {
                "category": "dns",
                "title": "Name server redundancy",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "4 NS record(s); 2 or more required."
            },
            {
                "category": "dns",
                "title": "SOA record",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0,
                "detail": "Authoritative zone record."
            },
            {
                "category": "dns",
                "title": "DNSSEC chain",
                "max_points": 15,
                "earned_points": 15,
                "lost_points": 0,
                "detail": "DS and DNSKEY detected."
            },
            {
                "category": "dns",
                "title": "CAA policy",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5,
                "detail": "Certificate authority restriction."
            },
            {
                "category": "dns",
                "title": "DNS propagation",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0,
                "detail": "Agreement between public resolvers."
            },
            {
                "category": "mail",
                "title": "MX records",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "2 MX record(s)."
            },
            {
                "category": "mail",
                "title": "SPF",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0,
                "detail": "SPF policy published."
            },
            {
                "category": "mail",
                "title": "DMARC",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0,
                "detail": "DMARC policy published."
            },
            {
                "category": "mail",
                "title": "DKIM",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "A DKIM selector was verified."
            },
            {
                "category": "mail",
                "title": "MTA-STS",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5,
                "detail": "Mail transport policy."
            },
            {
                "category": "mail",
                "title": "TLS-RPT",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5,
                "detail": "TLS reporting policy."
            },
            {
                "category": "security",
                "title": "Valid TLS certificate",
                "max_points": 55,
                "earned_points": 55,
                "lost_points": 0,
                "detail": "70 day(s) remaining."
            },
            {
                "category": "security",
                "title": "Certificate lifetime",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0,
                "detail": "Full points require at least 30 days remaining."
            },
            {
                "category": "security",
                "title": "HTTP security headers",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0,
                "detail": "9 of 9 evaluated headers detected."
            },
            {
                "category": "network",
                "title": "PTR reverse DNS",
                "max_points": 30,
                "earned_points": 0,
                "lost_points": 30,
                "detail": "PTR not detected."
            },
            {
                "category": "network",
                "title": "IPv4 diversity",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0,
                "detail": "Two or more IPv4 addresses receive full points."
            },
            {
                "category": "network",
                "title": "IPv6 connectivity",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0,
                "detail": "AAAA availability."
            },
            {
                "category": "availability",
                "title": "DNS resolution",
                "max_points": 40,
                "earned_points": 40,
                "lost_points": 0,
                "detail": "At least one address family must resolve."
            },
            {
                "category": "availability",
                "title": "HTTP response",
                "max_points": 40,
                "earned_points": 0,
                "lost_points": 40,
                "detail": "HTTP/2 403 "
            },
            {
                "category": "availability",
                "title": "HTTPS final URL",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "Final URL uses HTTPS."
            }
        ],
        "methodology": "Each category is normalized to 100. The total is the weighted sum: DNS 25%, Email 20%, Security 25%, Network 10%, Availability 20%.",
        "diagnostics": [
            {
                "level": "ok",
                "title": "IPv4 (A)",
                "detail": "2 IPv4 address(es) detected.",
                "category": "dns",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "IPv6 (AAAA)",
                "detail": "2 IPv6 address(es) detected.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "Name server redundancy",
                "detail": "4 NS record(s); 2 or more required.",
                "category": "dns",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "SOA record",
                "detail": "Authoritative zone record.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "DNSSEC chain",
                "detail": "DS and DNSKEY detected.",
                "category": "dns",
                "max_points": 15,
                "earned_points": 15,
                "lost_points": 0
            },
            {
                "level": "error",
                "title": "CAA policy",
                "detail": "Certificate authority restriction.",
                "category": "dns",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5
            },
            {
                "level": "ok",
                "title": "DNS propagation",
                "detail": "Agreement between public resolvers.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "MX records",
                "detail": "2 MX record(s).",
                "category": "mail",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "SPF",
                "detail": "SPF policy published.",
                "category": "mail",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "DMARC",
                "detail": "DMARC policy published.",
                "category": "mail",
                "max_points": 25,
                "earned_points": 25,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "DKIM",
                "detail": "A DKIM selector was verified.",
                "category": "mail",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0
            },
            {
                "level": "error",
                "title": "MTA-STS",
                "detail": "Mail transport policy.",
                "category": "mail",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5
            },
            {
                "level": "error",
                "title": "TLS-RPT",
                "detail": "TLS reporting policy.",
                "category": "mail",
                "max_points": 5,
                "earned_points": 0,
                "lost_points": 5
            },
            {
                "level": "ok",
                "title": "Valid TLS certificate",
                "detail": "70 day(s) remaining.",
                "category": "security",
                "max_points": 55,
                "earned_points": 55,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "Certificate lifetime",
                "detail": "Full points require at least 30 days remaining.",
                "category": "security",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "HTTP security headers",
                "detail": "9 of 9 evaluated headers detected.",
                "category": "security",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0
            },
            {
                "level": "error",
                "title": "PTR reverse DNS",
                "detail": "PTR not detected.",
                "category": "network",
                "max_points": 30,
                "earned_points": 0,
                "lost_points": 30
            },
            {
                "level": "ok",
                "title": "IPv4 diversity",
                "detail": "Two or more IPv4 addresses receive full points.",
                "category": "network",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "IPv6 connectivity",
                "detail": "AAAA availability.",
                "category": "network",
                "max_points": 35,
                "earned_points": 35,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "DNS resolution",
                "detail": "At least one address family must resolve.",
                "category": "availability",
                "max_points": 40,
                "earned_points": 40,
                "lost_points": 0
            },
            {
                "level": "error",
                "title": "HTTP response",
                "detail": "HTTP/2 403 ",
                "category": "availability",
                "max_points": 40,
                "earned_points": 0,
                "lost_points": 40
            },
            {
                "level": "ok",
                "title": "HTTPS final URL",
                "detail": "Final URL uses HTTPS.",
                "category": "availability",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0
            }
        ]
    },
    "dns": {
        "records": {
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                "172.66.0.37",
                "162.159.140.37"
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            "AAAA": [
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            "MX": [
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                "\"e2ma-verification=exibb\"",
                "\"smartsheet-site-validation=oY0nb96C6xG5_loWLLzVF04btLiZQow5\"",
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                "\"wpe-verification=readinqwrite\"",
                "\"e2ma-verification=sk8fb\"",
                "\"e2ma-verification=nuhgb\"",
                "\"verified-for-netlify=123201_umich_virtual_tour_project\"",
                "\"mailerlite-domain-verification=4c9bd8e9bcc9532050d764926d28a7b0837605a3\"",
                "\"dropbox-domain-verification=a5yb6qz6602l\"",
                "\"autodesk-domain-verification=x-5-4PZ_F2G_bBj_BVsU\"",
                "\"google-site-verification=ePeJieY3ub5dyqoCqCMxcb00j5MqHIOfff7ev8gvp5M\"",
                "\"jamf-site-verification=81Baq4qavxoOLkx1VulB7w\"",
                "\"brevo-code:66f1aea179b9dac1e341bc96730a0903\"",
                "\"e2ma-verification=4o6\"",
                "\"miro-verification=701abed028a466315e4e96a7c16e0ae7b964447f\"",
                "\"atlassian-domain-verification=aOp85M18PqRt/5EUYxQey4nzX1W9HysNJrHZYX8vmb0Eu2k9t25awn2J5a/sZXz8\"",
                "\"google-site-verification=L00w8kdtX1yuVhzX8BrAZcAkJlYZ47T7f9sXnygWI78\"",
                "\"brevo-code:6a22fe2075c7836824d65669a2b8d509\"",
                "\"asv=063783b9e2e7b71b1519995753900010\"",
                "\"e2ma-verification=nslgb\"",
                "\"e2ma-verification=460eb\"",
                "\"atlassian-sending-domain-verification=64ae59ad-0030-417d-9da0-02203860823b\"",
                "\"e2ma-verification=zsz\"",
                "\"google-site-verification=b3J-sqZ0hI_gOlJLW3djTVXFHJYYKE_ojG38_5QJYLM\"",
                "\"brevo-code:3adf9f193073a2e465f1178a8226f655\"",
                "\"asv=3409cea16f931a90453c4c4e1fcadf99\"",
                "\"google-site-verification=mEb2ZEP3MoTTKDdiDTgoLUkRr5ycOhriZurxfxMYdCM\"",
                "\"brevo-code:27c34e1b5038f713e91b18edc091f7d3\"",
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                "\"v=spf1 redirect=_spf.mail.umich.edu\"",
                "\"iContact1258624\"",
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                "\"ms-domain-verification=806e6295-0316-4573-bdf1-125913e12997\"",
                "\"google-site-verification=oLGMsCZznEy3f0Wxww-5I9AF0m30h9m6Oqi3gclG9nY\"",
                "\"brevo-code:8a9b8c8b911006e247c943c7490896e5\"",
                "\"google-site-verification=P8BwxmavP7AqtCMjn4NWvFtyZWrP4-JA92e09PiKUTU\"",
                "\"google-site-verification=wlYuEbd-YP88QiCM4sz9RHQXkSlspXVdipF-EApRWLw\"",
                "\"d365mktkey=V4QCbGNWEzxRcvUOEjaSIlUlkEvJCfVPxdCjV7uSNxIx\"",
                "\"e2ma-verification=bbueb\"",
                "\"e2ma-verification=m3pgb\"",
                "\"vmware-cloud-verification-0612e704-564b-4c09-a310-5c66291ba4ab\"",
                "\"google-site-verification=xUO8BnEbTYcXYAAYFj4R1B_gXSBGJGT4el26p0w1RZ4\"",
                "\"google-site-verification=Vrq1UHkE6hvICU5PcYAEn-9eY2fAazHkfH_-UprlcDQ\"",
                "\"facebook-domain-verification=earrkog9l7y87qxotg01na6vp90ob6\""
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            "NS": [
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                "dns1.itd.umich.edu.",
                "dns2.itd.umich.edu.",
                "dns4.umich.org."
            ],
            "SOA": [
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            ],
            "CAA": [],
            "DS": [
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            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
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        "spf_analysis": {
            "valid": true,
            "lookups": 1,
            "final": "",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "none"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
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    "advanced": {
        "ptr": "",
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            "consistent": true,
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                    "provider": "Quad9",
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                    "result": [
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                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
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                    "time_ms": 56.72
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
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                        "172.66.0.37"
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                    "time_ms": 65.7
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            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Google Trust Services",
        "subject": "umich.edu",
        "valid_from": "2026-07-19T19:23:25-05:00",
        "valid_to": "2026-10-17T20:23:22-05:00",
        "days_remaining": 70,
        "san": [
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        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_256_GCM_SHA384"
    },
    "http": {
        "url": "https://umich.edu/",
        "status": "HTTP/2 403 ",
        "http_version": "3",
        "headers": {
            "date": "Sat, 08 Aug 2026 22:55:12 GMT",
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            "cf-mitigated": "challenge",
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