{
    "ok": true,
    "domain": "biomedcentral.com",
    "generated_at": "2026-08-08T17:52:58-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 75,
        "label": "Good",
        "categories": {
            "dns": 60,
            "mail": 90,
            "security": 81,
            "network": 20,
            "availability": 100
        },
        "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": 0,
                "lost_points": 10,
                "detail": "0 IPv6 address(es) detected."
            },
            {
                "category": "dns",
                "title": "Name server redundancy",
                "max_points": 20,
                "earned_points": 20,
                "lost_points": 0,
                "detail": "6 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": 0,
                "lost_points": 10,
                "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": "45 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": 16,
                "lost_points": 19,
                "detail": "4 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": 20,
                "lost_points": 15,
                "detail": "Two or more IPv4 addresses receive full points."
            },
            {
                "category": "network",
                "title": "IPv6 connectivity",
                "max_points": 35,
                "earned_points": 0,
                "lost_points": 35,
                "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": 40,
                "lost_points": 0,
                "detail": "HTTP/2 200 "
            },
            {
                "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": "error",
                "title": "IPv6 (AAAA)",
                "detail": "0 IPv6 address(es) detected.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 0,
                "lost_points": 10
            },
            {
                "level": "ok",
                "title": "Name server redundancy",
                "detail": "6 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": "error",
                "title": "DNS propagation",
                "detail": "Agreement between public resolvers.",
                "category": "dns",
                "max_points": 10,
                "earned_points": 0,
                "lost_points": 10
            },
            {
                "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": "45 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": "warning",
                "title": "HTTP security headers",
                "detail": "4 of 9 evaluated headers detected.",
                "category": "security",
                "max_points": 35,
                "earned_points": 16,
                "lost_points": 19
            },
            {
                "level": "error",
                "title": "PTR reverse DNS",
                "detail": "PTR not detected.",
                "category": "network",
                "max_points": 30,
                "earned_points": 0,
                "lost_points": 30
            },
            {
                "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": "error",
                "title": "IPv6 connectivity",
                "detail": "AAAA availability.",
                "category": "network",
                "max_points": 35,
                "earned_points": 0,
                "lost_points": 35
            },
            {
                "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": "ok",
                "title": "HTTP response",
                "detail": "HTTP/2 200 ",
                "category": "availability",
                "max_points": 40,
                "earned_points": 40,
                "lost_points": 0
            },
            {
                "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": [
                "146.75.80.95"
            ],
            "AAAA": [],
            "CNAME": [],
            "MX": [
                "10 mxa-002c5801.gslb.pphosted.com.",
                "10 mxb-002c5801.gslb.pphosted.com."
            ],
            "TXT": [
                "\"facebook-domain-verification=xre922w5m9nvmw5waqvlmnq41x7dcz\"",
                "\"anthropic-domain-verification-xrx7w7=tReUnYJJ3wTsWsyQdP8GakqR6\"",
                "\"adobe-idp-site-verification=e7d316e26179ad0d4b3f90cf2a0754eec7efe5ffd4e42fd68fb1bf562238e1e5\"",
                "\"globalsign-domain-verification=Myyx9Ky7tszX0BbqISSvJjgoGcwXoeDJCF_AYv4UI4\"",
                "\"figma-domain-verification=a02807ceec187285dae088008460ab5e258fd494d08ac0c2c56f3739ff32437f-1713256355\"",
                "\"canva-site-verification=Jmh9diDco9XlartV5akcdA\"",
                "\"_globalsign-domain-verification=OYfE_CcZQWFlEEOrR5yVCfCtmiQrm0bBdyUAJyg3qE\"",
                "\"logmein-verification-code=ab8ef76a-a2b4-415a-a019-7917caa85838\"",
                "\"extensis-domain-verification=247a2c5e-b2c3-477e-a1a1-69522ce10b98\"",
                "\"docusign=c61dc97d-90e4-4de9-af63-e70f97e1f783\"",
                "\"zapier-domain-verification-challenge=a25e9ca6-d313-4cec-94a5-aa8dde7c39cf\"",
                "\"1password-site-verification=SSE6LJR5OZCBPHTQVLNARPIPGI\"",
                "\"google-site-verification=PMA0l5p3valJp2QZdgL9GFICUNmnMyz7xn8uUIqaod8\"",
                "\"amazonses:wq0TMrNu/vcOjc2BZI7xzuBznIUVO0yeSNu+kZ0/eV4=\"",
                "\"cisco-ci-domain-verification=291ae6187ea18e0234c2e1c9f08f6baddd910afbb66b5c62fbb58c7e1aa99a11\"",
                "\"google-site-verification=R7ISj7nuUNrrKZ5idAlSAyEzMWU6jdmcRZT2KBGF8LY\"",
                "\"docker-verification=4885e084-3f59-48db-93af-4a98f58a61eb\"",
                "\"deepl-domain-verification=b8faec8a0acd4830a6c745d36a104c04\"",
                "\"v=spf1 a:mailer.biomedcentral.com ip4:167.89.16.99 ip4:195.140.184.0/22 ip4:195.128.10.25/32 ip4:195.128.10.24/32 ip4:195.128.10.23/32 ip4:66.159.232.113/32 ip4:66.159.234.15/32 ip4:195.128.10.15/32 ip4:195.128.10.18/32 ip4:63.116.214.22/32 ip4:147.253.20\" \"8.0/20 ip4:192.174.80.0/20 ip4:52.39.255.168/32 include:spf.mandrillapp.com include:spf-002c5801.pphosted.com include:_spf.salesforce.com -all\"",
                "\"MS=ms78691022\"",
                "\"Hello GlobalSign CEOS1602043687\""
            ],
            "NS": [
                "pdns2.ultradns.net.",
                "pdns1.ultradns.net.",
                "pdns6.ultradns.co.uk.",
                "pdns5.ultradns.info.",
                "pdns3.ultradns.org.",
                "pdns4.ultradns.org."
            ],
            "SOA": [
                "pdns1.ultradns.net. hostmaster.springer.com. 2009029480 7200 900 604800 3600"
            ],
            "CAA": [],
            "DS": [],
            "DNSKEY": [],
            "RRSIG": [],
            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
        },
        "ipv4": [
            "146.75.80.95"
        ],
        "ipv6": []
    },
    "mail": {
        "spf": "v=spf1 a:mailer.biomedcentral.com ip4:167.89.16.99 ip4:195.140.184.0/22 ip4:195.128.10.25/32 ip4:195.128.10.24/32 ip4:195.128.10.23/32 ip4:66.159.232.113/32 ip4:66.159.234.15/32 ip4:195.128.10.15/32 ip4:195.128.10.18/32 ip4:63.116.214.22/32 ip4:147.253.208.0/20 ip4:192.174.80.0/20 ip4:52.39.255.168/32 include:spf.mandrillapp.com include:spf-002c5801.pphosted.com include:_spf.salesforce.com -all",
        "dmarc": "v=DMARC1; p=reject; pct=100; rua=mailto:re+d7esgfsijzu@dmarc.postmarkapp.com; sp=none; aspf=r;",
        "dkim_selector": "k2",
        "dkim_host": "k2._domainkey.biomedcentral.com",
        "dkim": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA0b90ObWaLDc+i9MtTNmGeWO009hr20fIxhGg6XBT2kjZ1DTThopSe1nAndsupmcBwlQ5Q6LJ+ZAxLcujnPIxM0ZBLmgpkv8u6RfY4eFP8OLvdAW3oSuB0DyLDigQX4Sj8wBO4YIdQH6AAmBeOsidsKAFNFUCpc3vCxtBDR12U+cBg724l3sBkMQ8evnz6idnqxq9QAVYh8k4kJ+RP+6cqTdy7LjIm8xY/bQNpQIpGUAuDo2DjLcCDun9DAI4Q/3z+Q0o9QuQIDAQAB;",
        "spf_analysis": {
            "valid": true,
            "lookups": 4,
            "final": "-all",
            "message": "Within the estimated limit"
        },
        "dmarc_analysis": {
            "valid": true,
            "policy": "reject"
        },
        "bimi": "",
        "mta_sts": "",
        "tls_rpt": ""
    },
    "advanced": {
        "ptr": "",
        "propagation": {
            "consistent": false,
            "results": [
                {
                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
                        "146.75.104.95"
                    ],
                    "time_ms": 57.41
                },
                {
                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
                    "result": [
                        "146.75.80.95"
                    ],
                    "time_ms": 59.61
                },
                {
                    "provider": "Quad9",
                    "server": "9.9.9.9",
                    "result": [
                        "146.75.80.95"
                    ],
                    "time_ms": 61.93
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
                        "151.101.124.95"
                    ],
                    "time_ms": 97.19
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
                        "199.232.36.95"
                    ],
                    "time_ms": 71.27
                }
            ]
        }
    },
    "ssl": {
        "available": true,
        "issuer": "Let's Encrypt",
        "subject": "biomedcentral.com",
        "valid_from": "2026-06-25T17:08:01-05:00",
        "valid_to": "2026-09-23T17:08:00-05:00",
        "days_remaining": 45,
        "san": [
            "biomedcentral.com"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_128_GCM_SHA256"
    },
    "http": {
        "url": "https://link.springer.com/brands/bmc?error=cookies_not_supported&code=39a3bd98-3936-4aea-a3c4-772d69343801",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "retry-after": "0",
            "cache-control": "no-cache, no-store, max-age=0, must-revalidate",
            "location": "https://link.springer.com/brands/bmc?error=cookies_not_supported&code=39a3bd98-3936-4aea-a3c4-772d69343801",
            "server": "Oscar Platform 0.1753.0",
            "accept-ranges": "bytes",
            "date": "Sat, 08 Aug 2026 22:52:57 GMT",
            "via": "1.1 google, 1.1 varnish",
            "x-served-by": "cache-83dcdfda-internal, cache-stl760068-STL, cache-stl760075-STL",
            "x-cache": "MISS, MISS, MISS",
            "x-cache-hits": "0, 0",
            "x-timer": "S1786229577.328918,VS0,VE493",
            "alt-svc": "h3=\":443\";ma=86400,h3-29=\":443\";ma=86400,h3-27=\":443\";ma=86400",
            "content-length": "0",
            "x-vcap-request-id": "bb11f191-1df6-4674-760d-69259c9afbf4",
            "content-type": "text/html; charset=utf-8",
            "strict-transport-security": "max-age=31536000 ; includeSubDomains",
            "age": "0",
            "vary": "x-frame-options,X-Oscar-Cache-Mode, Accept-Encoding",
            "tracestate": "gorouter=e58867729d04e235",
            "x-b3-traceid": "557f487fb5eff05f",
            "x-b3-sampled": "1",
            "traceparent": "00-bb11f1911df64674760d69259c9afbf4-f9352eb563420daf-01",
            "x-b3-spanid": "df2c40b13c8dc02b",
            "x-dump-request-bodies": "0",
            "x-frame-options": "DENY",
            "server-timing": "traceparent;desc=\"00-f90f462041f64e01572afd5871e4e4a6-a4a629220ae03b9f-01\"",
            "expires": "0",
            "set-cookie": "user.uuid.v2=\"bad1600e-5c96-4942-879d-10555ff3efe6\"; Expires=Sun, 08 Nov 2026 22:52:57 GMT; Domain=.springer.com; Path=/; secure; HttpOnly",
            "x-xss-protection": "1; mode=block",
            "content-security-policy": "frame-ancestors 'none';",
            "access-control-expose-headers": "Server-Timing",
            "pragma": "no-cache",
            "x-content-type-options": "nosniff",
            "content-language": "en-US",
            "etag": "W/\"648617642b1e2715c8d2e92c7ecb9dcc\""
        },
        "security_checks": {
            "strict-transport-security": true,
            "content-security-policy": true,
            "x-content-type-options": true,
            "x-frame-options": true,
            "referrer-policy": false,
            "permissions-policy": false,
            "cross-origin-opener-policy": false,
            "cross-origin-embedder-policy": false,
            "cross-origin-resource-policy": false
        },
        "server": "Oscar Platform 0.1753.0",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://link.springer.com/brands/bmc",
        "title": "Client Challenge",
        "description": "",
        "success": true,
        "error": "",
        "status": 200
    },
    "network": {
        "146.75.80.95": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "mxa-002c5801.gslb.pphosted.com",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 29,
                "banner": "",
                "error": "Connection refused"
            },
            {
                "port": 465,
                "open": false,
                "time_ms": 96.9,
                "banner": "",
                "error": "Connection refused"
            },
            {
                "port": 587,
                "open": false,
                "time_ms": 137.7,
                "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": 90.93
}