{
    "ok": true,
    "domain": "sigmaaldrich.com",
    "generated_at": "2026-08-09T09:05:02-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 71,
        "label": "Fair",
        "categories": {
            "dns": 80,
            "mail": 70,
            "security": 65,
            "network": 85,
            "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": "1 IPv4 address(es) detected."
            },
            {
                "category": "dns",
                "title": "IPv6 (AAAA)",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0,
                "detail": "1 IPv6 address(es) detected."
            },
            {
                "category": "dns",
                "title": "Name server redundancy",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "2 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": 0,
                "lost_points": 15,
                "detail": "Both DS and DNSKEY are required."
            },
            {
                "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": 0,
                "lost_points": 20,
                "detail": "No tested DKIM selector responded."
            },
            {
                "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": "88 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": 0,
                "lost_points": 35,
                "detail": "0 of 9 evaluated headers detected."
            },
            {
                "category": "network",
                "title": "PTR reverse DNS",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0,
                "detail": "PTR: sslfwd.questeldomains.com"
            },
            {
                "category": "network",
                "title": "IPv4 diversity",
                "max_points": 35,
                "earned_points": 20,
                "lost_points": 15,
                "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": "No successful HTTP response."
            },
            {
                "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": "1 IPv4 address(es) detected.",
                "category": "dns",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "IPv6 (AAAA)",
                "detail": "1 IPv6 address(es) detected.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 10,
                "lost_points": 0
            },
            {
                "level": "ok",
                "title": "Name server redundancy",
                "detail": "2 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": "error",
                "title": "DNSSEC chain",
                "detail": "Both DS and DNSKEY are required.",
                "category": "dns",
                "max_points": 15,
                "earned_points": 0,
                "lost_points": 15
            },
            {
                "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": "error",
                "title": "DKIM",
                "detail": "No tested DKIM selector responded.",
                "category": "mail",
                "max_points": 20,
                "earned_points": 0,
                "lost_points": 20
            },
            {
                "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": "88 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": "error",
                "title": "HTTP security headers",
                "detail": "0 of 9 evaluated headers detected.",
                "category": "security",
                "max_points": 35,
                "earned_points": 0,
                "lost_points": 35
            },
            {
                "level": "ok",
                "title": "PTR reverse DNS",
                "detail": "PTR: sslfwd.questeldomains.com",
                "category": "network",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0
            },
            {
                "level": "warning",
                "title": "IPv4 diversity",
                "detail": "Two or more IPv4 addresses receive full points.",
                "category": "network",
                "max_points": 35,
                "earned_points": 20,
                "lost_points": 15
            },
            {
                "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": "No successful HTTP response.",
                "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": {
            "A": [
                "185.123.52.199"
            ],
            "AAAA": [
                "2a10:ec6:1:3:185:123:52:199"
            ],
            "CNAME": [],
            "MX": [
                "10 mxa-005f4802.gslb.pphosted.com.",
                "10 mxb-005f4802.gslb.pphosted.com."
            ],
            "TXT": [
                "\"z88l2xkshn69czfqgmsj9c6d50vqxf7c\"",
                "\"_globalsign-domain-verification=6bP9qCGkjtv6lK1oUUk1GW_aLlwQ_rTa1zcOrqYRVM\"",
                "\"_globalsign-domain-verification=49OWFydCiWRZ_S8Vdp-VLIQnUn-kkSxNGgyJMa_138\"",
                "\"globalsign-domain-verification=9312CD11FDE849F8FCAA78D6BCF99770\"",
                "\"globalsign-domain-verification=0B0F53EC216D660702AE4A9A63D72F74\"",
                "\"globalsign-domain-verification=4b8078824d1dae9350e707486ba9ddcf\"",
                "\"google-site-verification=KKFNroCgQrT3ZAFS7xbHZcXZsBhazWIB3vtKfOb6ouM\"",
                "\"_validation-contactemail webadmin-devops@merckgroup.com\"",
                "\"globalsign-domain-verification=2B6B5C4C6BBB5B5AAE6F089837878D86\"",
                "\"globalsign-domain-verification=89F2BF086C30F3085DED32FBBB0991A3\"",
                "\"google-site-verification=ZC0ucf6BRwGfNGBgaSbxM5KdOZnUrckPsTDLMlRoLMs\"",
                "\"globalsign-domain-verification=D947A57FF568DBB84DFA710946DACB6A\"",
                "\"_globalsign-domain-verification=i-eF5zY4dQy_1FzurxY-vB_ehho_ANc_RUBJNFcEiB\"",
                "\"_svi1ncu4cumr6nw5k1znkab0qr691rv\"",
                "\"globalsign-domain-verification=f18a5fb3e440e14833097a09ffff7640\"",
                "\"_cy951hhy8mw82q69dkjgsax6jh39est\"",
                "\"globalsign-domain-verification=BD227E1F68FD41038F4DAD17EF9A42BB\"",
                "\"google-site-verification=O9x5KvwEgll7z5DhE7KwBzaHYHIwh2LjiLwfWZdO5kE\"",
                "\"_cftn9x585yz9b3cb3i1ari4j6bh65sp\"",
                "\"_wet0jp28oexnv3cnu099w2wr13wnkzq\"",
                "\"globalsign-domain-verification=3263E2B0098AC99D0EAE1857F3721EC2\"",
                "\"yandex-verification: fe89f4ca9b23bb00\"",
                "\"MS=ms81241719\"",
                "\"v=spf1 include:spf-005f4802.pphosted.com include:spf.protection.outlook.com include:_spf.esi-sa.com ~all\"",
                "\"globalsign-domain-verification=0B6BE80F6F80EB75317351E4028F99FA\"",
                "\"globalsign-domain-verification=FA2F4FC98028B53BED16786E870D92E7\"",
                "\"_qeapzxdelh7xfhnlqcuywo7ygi7hifv\"",
                "\"globalsign-domain-verification=B950605920163BED51E14CB3C71113BB\"",
                "\"_globalsign-domain-verification=y-WbZfGH3iscpkgt-BmoaO4oBPfJ1RVC-VsPFSFLIe\"",
                "\"google-site-verification=fOh8OkUz9z2sxgSRHJAX7-q6I5C-HiR3mcm3yj9uU0E\"",
                "\"cmbglg0tbxlzvxgtmc7mr45jc7wxl9w4\"",
                "\"globalsign-domain-verification=dface27f0430d7d08dfadc50dae06cbe\"",
                "\"globalsign-domain-verification=c000b885bf4ac44d3c1ae3a95c241dde\"",
                "\"globalsign-domain-verification=7E9C6273286D016BC739F611C23B14B3\""
            ],
            "NS": [
                "ns01.brandshelter.com.",
                "ns02.brandshelter.net."
            ],
            "SOA": [
                "ns01.brandshelter.com. tech.brandshelter.com. 2026080800 28800 600 1209600 300"
            ],
            "CAA": [],
            "DS": [],
            "DNSKEY": [],
            "RRSIG": [],
            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "185.123.52.199"
        ],
        "ipv6": [
            "2a10:ec6:1:3:185:123:52:199"
        ]
    },
    "mail": {
        "spf": "v=spf1 include:spf-005f4802.pphosted.com include:spf.protection.outlook.com include:_spf.esi-sa.com ~all",
        "dmarc": "v=DMARC1; p=reject; sp=reject; fo=1; rua=mailto:dmarc_reports@m.group; ruf=mailto:dmarc_reports@m.group",
        "dkim_selector": "x",
        "dkim_host": "",
        "dkim": "",
        "spf_analysis": {
            "valid": true,
            "lookups": 3,
            "final": "~all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "reject"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "sslfwd.questeldomains.com",
        "propagation": {
            "consistent": true,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "185.123.52.199"
                    ],
                    "time_ms": 84.97
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "185.123.52.199"
                    ],
                    "time_ms": 26.76
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "185.123.52.199"
                    ],
                    "time_ms": 56.45
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "185.123.52.199"
                    ],
                    "time_ms": 27.08
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "185.123.52.199"
                    ],
                    "time_ms": 155.13
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Let's Encrypt",
        "subject": "sigmaaldrich.com",
        "valid_from": "2026-08-08T00:55:05-05:00",
        "valid_to": "2026-11-05T23:55:04-06:00",
        "days_remaining": 88,
        "san": [
            "sigmaaldrich.com"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_256_GCM_SHA384"
    },
    "http": {
        "url": "https://www.sigmaaldrich.com/",
        "status": "",
        "http_version": "2",
        "headers": [],
        "security_checks": {
            "strict-transport-security": false,
            "content-security-policy": false,
            "x-content-type-options": false,
            "x-frame-options": false,
            "referrer-policy": false,
            "permissions-policy": false,
            "cross-origin-opener-policy": false,
            "cross-origin-embedder-policy": false,
            "cross-origin-resource-policy": false
        },
        "server": "",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://sigmaaldrich.com/",
        "title": "",
        "description": "",
        "success": false,
        "error": "HTTP/2 stream 0 was not closed cleanly: INTERNAL_ERROR (err 2)"
    },
    "network": {
        "185.123.52.199": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "mxa-005f4802.gslb.pphosted.com",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 50.7,
                "banner": "",
                "error": "Connection refused"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 133,
                "banner": "",
                "error": "Connection refused"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 97.1,
                "banner": "",
                "error": "Connection refused"
            }
        ]
    },
    "visitor": {
        "ip": "216.73.217.62",
        "reverse": "",
        "country": "",
        "country_code": "",
        "region": "",
        "city": "",
        "latitude": null,
        "longitude": null,
        "isp": "",
        "organization": "",
        "asn": "",
        "timezone": "",
        "browser": "Other",
        "os": "Other",
        "language": "",
        "user_agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
        "is_bot": true,
        "cloudflare": false
    },
    "analysis_time_ms": 94.22
}