{
    "ok": true,
    "domain": "slack.com",
    "generated_at": "2026-08-08T18:16:12-05:00",
    "cache": {
        "hit": true,
        "ttl": 0
    },
    "score": {
        "total": 84,
        "label": "Good",
        "categories": {
            "dns": 90,
            "mail": 70,
            "security": 81,
            "network": 65,
            "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": "4 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": "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": 5,
                "lost_points": 0,
                "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": "5 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": "87 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": 30,
                "lost_points": 0,
                "detail": "PTR: ec2-18-169-61-189.eu-west-2.compute.amazonaws.com"
            },
            {
                "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": 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": "4 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": "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": "ok",
                "title": "CAA policy",
                "detail": "Certificate authority restriction.",
                "category": "dns",
                "max_points": 5,
                "earned_points": 5,
                "lost_points": 0
            },
            {
                "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": "5 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": "87 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": "ok",
                "title": "PTR reverse DNS",
                "detail": "PTR: ec2-18-169-61-189.eu-west-2.compute.amazonaws.com",
                "category": "network",
                "max_points": 30,
                "earned_points": 30,
                "lost_points": 0
            },
            {
                "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": "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": {
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                "18.169.61.189",
                "18.134.215.41",
                "18.169.120.191",
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            "AAAA": [],
            "CNAME": [],
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            "TXT": [
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                "\"google-site-verification=KqX3Ngw0XEjz_0GVx_xwFFlCoO-bskhqU_lxv0Q77mk\"",
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                "ns-606.awsdns-11.net."
            ],
            "SOA": [
                "ns-1493.awsdns-58.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 300"
            ],
            "CAA": [
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                "0 issue \"digicert.com; account=455b15ed272bed097725c6ea50e89921fc57379c5338a29305c05771df65fff1\"",
                "0 issue \"letsencrypt.org; accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1532134906\""
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            "DS": [
                "296 13 2 601D7EC07E7DEE6E1AB6A3E5B2DA170F8353375FEA63AF2B732FAA5A 22898EA0"
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            "DNSKEY": [
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            "NSEC": [],
            "NSEC3": [],
            "SRV": [],
            "NAPTR": [],
            "TLSA": [],
            "SSHFP": []
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        "ipv4": [
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            "18.134.215.41",
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        "ipv6": []
    },
    "mail": {
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        "dmarc": "v=DMARC1;p=reject;fo=1:d:s;pct=100;rua=mailto:dmarc_agg@vali.email,mailto:0e5a5c34@inbox.ondmarc.com;ruf=mailto:0e5a5c34@inbox.ondmarc.com",
        "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": "ec2-18-169-61-189.eu-west-2.compute.amazonaws.com",
        "propagation": {
            "consistent": true,
            "results": [
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                    "provider": "Google",
                    "server": "8.8.8.8",
                    "result": [
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                        "3.130.95.182",
                        "3.134.44.134",
                        "3.142.111.40",
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                    "time_ms": 67.3
                },
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                    "provider": "Cloudflare",
                    "server": "1.1.1.1",
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                    "time_ms": 37.65
                },
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                    "provider": "Quad9",
                    "server": "9.9.9.9",
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                    "time_ms": 35.8
                },
                {
                    "provider": "OpenDNS",
                    "server": "208.67.222.222",
                    "result": [
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                    "time_ms": 34.9
                },
                {
                    "provider": "AdGuard",
                    "server": "94.140.14.14",
                    "result": [
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                    "time_ms": 48.96
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    },
    "ssl": {
        "available": true,
        "issuer": "Let's Encrypt",
        "subject": "slack.com",
        "valid_from": "2026-08-06T04:33:39-05:00",
        "valid_to": "2026-11-04T03:33:38-06:00",
        "days_remaining": 87,
        "san": [
            "*.slack.com",
            "slack.com"
        ],
        "protocol": "TLSv1.3",
        "cipher": "TLS_AES_256_GCM_SHA384"
    },
    "http": {
        "url": "https://slack.com/",
        "status": "HTTP/2 200 ",
        "http_version": "3",
        "headers": {
            "date": "Sat, 08 Aug 2026 23:16:03 GMT",
            "server": "Apache",
            "vary": "Accept-Encoding",
            "x-xss-protection": "0",
            "content-type": "text/html; charset=utf-8",
            "cross-origin-opener-policy": "same-origin",
            "strict-transport-security": "max-age=31536000; includeSubDomains; preload",
            "referrer-policy": "no-referrer",
            "x-slack-unique-id": "ane4s_wYym85fphQAd1U-QAAACA",
            "x-frame-options": "SAMEORIGIN",
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            "x-envoy-upstream-service-time": "164",
            "x-backend": "main_normal",
            "x-server": "slack-www-hhvm-main-iad-04i6a25xiwg4",
            "x-slack-shared-secret-outcome": "no-match",
            "x-edge-backend": "envoy-www",
            "timing-allow-origin": "*",
            "alt-svc": "h3=\":443\"; ma=2592000, h3-29=\":443\"; ma=2592000, quic=\":443\"; ma=2592000",
            "x-slack-edge-shared-secret-outcome": "no-match"
        },
        "security_checks": {
            "strict-transport-security": true,
            "content-security-policy": false,
            "x-content-type-options": false,
            "x-frame-options": true,
            "referrer-policy": true,
            "permissions-policy": false,
            "cross-origin-opener-policy": true,
            "cross-origin-embedder-policy": false,
            "cross-origin-resource-policy": false
        },
        "server": "Apache",
        "powered_by": ""
    },
    "webpage": {
        "url": "https://slack.com/",
        "title": "Slack | AI Work Platform & Productivity Tools",
        "description": "Boost productivity and save time with Slack‌ — ‌the AI work platform for managing projects, automating workflows, and connecting teams securely. Start working smarter today.",
        "success": true,
        "error": "",
        "status": 206
    },
    "network": {
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            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        },
        "18.134.215.41": {
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            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        },
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            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        },
        "18.168.172.238": {
            "success": false,
            "country": "",
            "region": "",
            "city": "",
            "asn": "",
            "organization": "",
            "isp": ""
        }
    },
    "smtp": {
        "host": "aspmx3.googlemail.com",
        "ports": [
            {
                "port": 25,
                "open": false,
                "time_ms": 0.9,
                "banner": "",
                "error": "Network is unreachable"
            },
            {
                "port": 465,
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