{ "ok": true, "domain": "shmoop.com", "generated_at": "2026-08-11T10:52:37-05:00", "cache": { "hit": true, "ttl": 0 }, "score": { "total": 86, "label": "Good", "categories": { "dns": 85, "mail": 90, "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": "2 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": 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": "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": 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": "181 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: ec2-44-214-85-33.compute-1.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": "2 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": "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": "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": "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": "181 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: ec2-44-214-85-33.compute-1.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": { "records": { "A": [ "44.214.85.33", "54.159.240.117" ], "AAAA": [], "CNAME": [], "MX": [ "10 alt2.aspmx.l.google.com.", "10 alt1.aspmx.l.google.com.", "20 aspmx3.googlemail.com.", "0 aspmx.l.google.com.", "20 aspmx2.googlemail.com." ], "TXT": [ "\"MS=5FA793AD75C70AB74C566F1A7C420C7BCACF0DF8\"", "\"google-site-verification=ATvQ8sqYvjRBODX0oIarND8cIHMQJpBxS3qc8XUVr_Y\"", "\"MS=ms27848326\"", "\"apple-domain-verification=F0Js2NkAKw72T11c\"", "\"v=spf1 include:_spf.google.com include:spf.mailengine1.com include:spf.mandrillapp.com include:servers.mcsv.net include:spfva.shmoop.com include:amazonses.com include:_spf.psm.knowbe4.com ~all\"", "\"google-site-verification=IIvTLC-SgUleEo1zKxmjosvL65IYsuB-a_qsYgyDqFU\"", "\"google-site-verification=-wVZLD8XYz7gyZQNYove_nyfqmACSp5LZ5OiwLgDu8Y\"", "\"ppe-44d8fc8afa4748860bb4e80069d2a62cae06d859\"", "\"google-site-verification=tHqUXLdEfYufYPw2ZsEq46bmI_q6FebLM6VQcT1p8p8\"", "\"google-site-verification=Te_ZKbzLWyJq-IlhKghM7w31l1A_COJfKYXX1xUGuo8'\"", "\"ZOOM_verify_ss6W4zF-QGKllJzU4HYvHw\"", "\"asv=f9ef196d0d459997427e4d3eb50586ce\"", "\"'google-site-verification=qYgsr52eC6kKkkK-R9H23wzkFC6O5Ujfi6-oGn-1u3o\"" ], "NS": [ "ns-718.awsdns-25.net.", "ns-1136.awsdns-14.org.", "ns-1854.awsdns-39.co.uk.", "ns-389.awsdns-48.com." ], "SOA": [ "ns-1136.awsdns-14.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400" ], "CAA": [], "DS": [ "40181 13 2 22583394CE85FBCBAE25DBCBA09F405D6B64F3614D31B39A1F2CFF61 CA8FDB5E" ], "DNSKEY": [ "257 3 13 Y4GvcO9ymcBz8gsZHXZ5CnKH+AjkG0Os013AqzVpWreHLqrODx5uGhWu 55vevT2FWSZna9O+FBSnc6YEXS0U5g==", "256 3 13 GkN622/FZs0Ljmipp3RMpXv5Be5Ck+3iMam7YN4osa3ktKQGRtrALntT e7ClwACROQiJ11l9z7D+N6u6R0Go9A==", "256 3 13 KnyE7iCAosGYVs2NYt7qaAtEF1Sc849igJVSN/uvq4s+xMxRpM0Kvlhz uKqcqBnJsPsaqPl9KM/ccQPsAFGbIw==" ], "RRSIG": [], "NSEC": [], "NSEC3": [], "SRV": [], "NAPTR": [], "TLSA": [], "SSHFP": [] }, "ipv4": [ "44.214.85.33", "54.159.240.117" ], "ipv6": [] }, "mail": { "spf": "v=spf1 include:_spf.google.com include:spf.mailengine1.com include:spf.mandrillapp.com include:servers.mcsv.net include:spfva.shmoop.com include:amazonses.com include:_spf.psm.knowbe4.com ~all", "dmarc": "v=DMARC1; p=none;", "dkim_selector": "google", "dkim_host": "google._domainkey.shmoop.com", "dkim": "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCXtOKlwVtP93GFalXMg/ZJLS2KgVgK2Yqv1cehZVs4lexIOdUSKB0t9Z5WHqZF49BX+5wOk5T4BhT9d8BHSpNRgQLL9anBv3tG6kLWYXJ98UhkKcR8cu8oHZvM5EiF5F1uwF0zoe+GOAQc9xyuxdBaBlfwDvYHP7LGsfsmnUnJIQIDAQAB", "spf_analysis": { "valid": true, "lookups": 7, "final": "~all", "message": "Within the estimated limit" }, "dmarc_analysis": { "valid": true, "policy": "none" }, "bimi": "", "mta_sts": "", "tls_rpt": "" }, "advanced": { "ptr": "ec2-44-214-85-33.compute-1.amazonaws.com", "propagation": { "consistent": true, "results": [ { "provider": "Google", "server": "8.8.8.8", "result": [ "44.214.85.33", "54.159.240.117" ], "time_ms": 72.84 }, { "provider": "Cloudflare", "server": "1.1.1.1", "result": [ "44.214.85.33", "54.159.240.117" ], "time_ms": 57.97 }, { "provider": "Quad9", "server": "9.9.9.9", "result": [ "44.214.85.33", "54.159.240.117" ], "time_ms": 67.09 }, { "provider": "OpenDNS", "server": "208.67.222.222", "result": [ "44.214.85.33", "54.159.240.117" ], "time_ms": 98.62 }, { "provider": "AdGuard", "server": "94.140.14.14", "result": [ "44.214.85.33", "54.159.240.117" ], "time_ms": 82.21 } ] } }, "ssl": { "available": true, "issuer": "Amazon", "subject": "shmoop.com", "valid_from": "2026-01-10T18:00:00-06:00", "valid_to": "2027-02-08T17:59:59-06:00", "days_remaining": 181, "san": [ "shmoop.com", "*.shmoop.com" ], "protocol": "TLSv1.2", "cipher": "ECDHE-RSA-AES128-GCM-SHA256" }, "http": { "url": "https://www.shmoop.com/", "status": "HTTP/2 200 ", "http_version": "3", "headers": { "date": "Tue, 11 Aug 2026 15:52:29 GMT", "content-type": "text/html; charset=UTF-8", "content-length": "162", "location": "https://www.shmoop.com/", "server": "nginx", "vary": "Accept-Encoding", "x-frame-options": "SAMEORIGIN", "set-cookie": "PHPSESSID=728a0f1840e30becec12c83d18ab80b5; path=/; secure; HttpOnly", "cache-control": "max-age=0, no-cache, no-store, must-revalidate", "pragma": "no-cache", "expires": "Wed, 11 Jan 1984 05:00:00 GMT", "strict-transport-security": "max-age=31536000", "x-content-type-options": "nosniff", "referrer-policy": "strict-origin-when-cross-origin", "x-upstream-addr": "10.60.6.172:21546" }, "security_checks": { "strict-transport-security": true, "content-security-policy": false, "x-content-type-options": true, "x-frame-options": true, "referrer-policy": true, "permissions-policy": false, "cross-origin-opener-policy": false, "cross-origin-embedder-policy": false, "cross-origin-resource-policy": false }, "server": "nginx", "powered_by": "" }, "webpage": { "url": "https://www.shmoop.com/", "title": "Homework Help & Study Guides For Students | Shmoop", "description": "The cozy home of your favorite free study guides and the most helpful study tools around! Check out our new digs and get the help you need!", "success": true, "error": "", "status": 200 }, "network": { "44.214.85.33": { "success": false, "country": "", "region": "", "city": "", "asn": "", "organization": "", "isp": "" }, "54.159.240.117": { "success": false, "country": "", "region": "", "city": "", "asn": "", "organization": "", "isp": "" } }, "smtp": { "host": "alt2.aspmx.l.google.com", "ports": [ { "port": 25, "open": false, "time_ms": 0.8, "banner": "", "error": "Network is unreachable" }, { "port": 465, "open": false, "time_ms": 4002.8, "banner": "", "error": "Connection timed out" }, { "port": 587, "open": false, "time_ms": 4018.3, "banner": "", "error": "Connection timed out" } ] }, "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": 111.52 }