{ "ok": true, "domain": "teachable.com", "generated_at": "2026-08-08T23:34:35-05:00", "cache": { "hit": true, "ttl": 0 }, "score": { "total": 78, "label": "Good", "categories": { "dns": 75, "mail": 90, "security": 77, "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": "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": 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": 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": "78 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": 12, "lost_points": 23, "detail": "3 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": "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": "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": "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": "78 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": "3 of 9 evaluated headers detected.", "category": "security", "max_points": 35, "earned_points": 12, "lost_points": 23 }, { "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": [ "198.202.211.1" ], "AAAA": [], "CNAME": [], "MX": [ "10 alt3.aspmx.l.google.com.", "10 alt4.aspmx.l.google.com.", "5 alt1.aspmx.l.google.com.", "1 aspmx.l.google.com.", "5 alt2.aspmx.l.google.com." ], "TXT": [ "\"asv=c51ca35fbb7757e5a6f0189deab2fb58\"", "\"proxy.webflow.com\"", "\"ambassador-portals-herokuapp\"", "\"google-site-verification=-lHHXk1MJFS7GNHGxz9HcrQ5Hrf_rXVpfbRP2J1wPyA\"", "\"rt5kk15rl1b081jo9q65p4a62\"", "\"zoom-domain-verification=c548cc54-1209-4bcc-929e-9aebef6e1ebb\"", "\"globalsign-domain-verification=vVNUJEiPJniKDdoWicJuKMf9V52-vb9KovoAIiiida\"", "\"apple-domain-verification=kcN2dcIuE6b07BgF\"", "\"ZOOM_verify_NG8JJfDLmTkqN4qjXE5DZh\"", "\"h1-domain-verification=xbXGwB1ZYgw5WHW5qfLj8zpYoYC2F7TX6ATcpReVWRrNeJGj\"", "\"v=spf1 include:_spf.google.com include:mailgun.org include:mail.zendesk.com ip6:fdaa:50fa:a9ce::/48 ip4:209.85.220.54 include:50445500.spf06.hubspotemail.net -all\"", "\"google-site-verification=XxQdRDFEuE3ogqMfmEMZMnHTqg5KlNGF0Hos6fnaR-A\"", "\"facebook-domain-verification=b6jirvkk1tilh9t8e1q57bh6b12s5x\"", "\"anthropic-domain-verification-70zj35=ReJuRTdgeCwK7K5zyWbi3aCmB\"", "\"QuoVadis=feba1d66-ea2f-40c4-9681-143442022cab\"", "\"have-i-been-pwned-verification=e29ac28e032e14176264d184461fe34a\"", "\"google-site-verification=-dkPR93_MrFSt8aPZGAqIXul1EZpImnubVUphDThJDE\"", "\"google-site-verification=ow9HKkznXRHS4XhYL1Gfab5TQRz15gZbTczSInjX7ZU\"", "\"atlassian-domain-verification=a9zEXCx1WsxRai9qeugknkTX2TV2ZRFywviwa7VbszMrReqWCSSghfkWl650QqEw\"", "\"stripe-verification=947db08420734c6564dbef86cd766deb88a724a9014d73900cf8ad125851c65a\"", "\"f2fnmke27g9bndg2f7de9bseh2\"", "\"stripe-verification=99e5b79db397a21ae18c991ecf52712d9e16b18db57319c2dccf2f9104b4428f\"", "\"google-site-verification=lz55OpUkDlIAbssMq5j6w7Q3TImgYsatyg6Fws8fIkQ\"", "\"google-site-verification=KuUrdPRv6-JotHpZjJF7Tw8oKUdXDLolfB9C4k_qwSA\"", "\"ps-cd-verification=f8d92b21-825e-4b5d-9dcc-e78fdd5c1aea\"", "\"A52B1579E6\"", "\"stripe-verification=6FD22B73E07DA0F1A55DE56B8AD7C3F286222B010A42F3CE40999F4B2EC28996\"", "\"MS=ms78296269\"", "\"firebase=teachable-webinar\"", "\"oacnl1dda6tcm54pe1mm0s7n4b\"", "\"google-site-verification=zS47T5jl0nSkNVgu8qCmj87R8YIZ-9H5oQNfbwsXIt0\"", "\"MS=ms46309658\"", "\"stripe-verification=dae8649612417f93f7c10abb4fb37a5be02d6a6e6ea56c03d577bd7c0c5d199e\"", "\"stripe-verification=1a64c5fdd4ee26490d82ef5ee20be2e13eeacfe52a411ba2be9442509f4a1e3f\"", "\"atlassian-domain-verification=ESx5jS7H0NuVg0RqhI/1FhVKZnGfWOBfbjHRR+ll2Vc9gqeFZMH+UYiMEUffQVx9\"", "\"mgverify=fdb0e4ab358548550e996faf8ce8baa3935f2caee833d7408b5d89cb2b933549\"", "\"miro-verification=fb5d52859a00082e01344fb4b074f7f6b2754326\"", "\"google-site-verification=xt5p8RRZL20KTDvpDiLVYmWfUO_VTyhuD9fz5vxtzZA\"" ], "NS": [ "ian.ns.cloudflare.com.", "nina.ns.cloudflare.com." ], "SOA": [ "ian.ns.cloudflare.com. dns.cloudflare.com. 2411712445 10000 2400 604800 1800" ], "CAA": [ "0 issuewild \"amazontrust.com\"", "0 issue \"awstrust.com\"", "0 issue \"amazontrust.com\"", "0 issue \"amazon.com\"", "0 issue \"godaddy.com\"", "0 issue \"comodoca.com\"", "0 issuewild \"amazon.com\"", "0 issue \"amazonaws.com\"", "0 issuewild \"godaddy.com\"", "0 issue \"pki.goog; cansignhttpexchanges=yes\"", "0 issue \"sectigo.com\"", "0 issuewild \"ssl.com\"", "0 issuewild \"pki.goog; cansignhttpexchanges=yes\"", "0 issue \"digicert.com; cansignhttpexchanges=yes\"", "0 issuewild \"letsencrypt.org\"", "0 issuewild \"awstrust.com\"", "0 issuewild \"sectigo.com\"", "0 issuewild \"comodoca.com\"", "0 issue \"letsencrypt.org\"", "0 issue \"ssl.com\"", "0 issuewild \"digicert.com; cansignhttpexchanges=yes\"", "0 issuewild \"amazonaws.com\"" ], "DS": [], "DNSKEY": [], "RRSIG": [], "NSEC": [], "NSEC3": [], "SRV": [], "NAPTR": [], "TLSA": [], "SSHFP": [] }, "ipv4": [ "198.202.211.1" ], "ipv6": [] }, "mail": { "spf": "v=spf1 include:_spf.google.com include:mailgun.org include:mail.zendesk.com ip6:fdaa:50fa:a9ce::/48 ip4:209.85.220.54 include:50445500.spf06.hubspotemail.net -all", "dmarc": "v=DMARC1; p=reject; sp=none; rua=mailto:dmarc@teachable.com; ruf=mailto:dmarc@teachable.com; rf=afrf; pct=100; ri=86400", "dkim_selector": "google", "dkim_host": "google._domainkey.teachable.com", "dkim": "v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoCEmLe88L5mPTBKOVw6mDEfr3ZAFA7J9CA30YtOYRy8a5rKbbYKqr7p7A2DEiEXNGmPQbaCz2Zo5URfAIe9Y0crAZQHGxCbrb5zo8GIGiPAhYvlXtYkJB2jXMASX8NQPUAU/k5NsDmFc5MJfJNlS2ZRr1iVCxIVT1RPNfdr1Ad5U7+Qhl3ojOUk8nrQzqjmg0yYWwbsTgHUSF7MXtD2HeE43E469eJBFp4kOuK3E+8c9O6t3d0YEkhQkQcnGbEEBFWeaGocMPbfNO+Mq6PTCatHcwq3X207iWHUcr7ImeQgE84zt3L9SovBU4i11DCsoELLnmq6eUCG7T3yhJhqtFQIDAQAB", "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": true, "results": [ { "provider": "Google", "server": "8.8.8.8", "result": [ "198.202.211.1" ], "time_ms": 53.12 }, { "provider": "Cloudflare", "server": "1.1.1.1", "result": [ "198.202.211.1" ], "time_ms": 19.64 }, { "provider": "Quad9", "server": "9.9.9.9", "result": [ "198.202.211.1" ], "time_ms": 37.35 }, { "provider": "OpenDNS", "server": "208.67.222.222", "result": [ "198.202.211.1" ], "time_ms": 29.79 }, { "provider": "AdGuard", "server": "94.140.14.14", "result": [ "198.202.211.1" ], "time_ms": 48.77 } ] } }, "ssl": { "available": true, "issuer": "Let's Encrypt", "subject": "teachable.com", "valid_from": "2026-07-28T01:35:15-05:00", "valid_to": "2026-10-26T01:35:14-05:00", "days_remaining": 78, "san": [ "teachable.com" ], "protocol": "TLSv1.3", "cipher": "TLS_AES_256_GCM_SHA384" }, "http": { "url": "https://www.teachable.com/", "status": "HTTP/2 200 ", "http_version": "3", "headers": { "date": "Sun, 09 Aug 2026 04:34:27 GMT", "content-type": "text/html; charset=utf-8", "content-length": "166", "location": "https://www.teachable.com/", "set-cookie": "_cfuvid=7KqTujodVY1zR.3MYQtkPz5B1FpjKeH3bW3WOJCVp6Y-1786250067.4706936-1.0.1.1-c2CGaTeEubUd84njXV6TMHHlvAWoQfU3d3uArp6bB_4; HttpOnly; SameSite=None; Secure; Path=/; Domain=www.teachable.com", "cf-ray": "a2840c69be1f6fbc-STL", "cf-cache-status": "HIT", "cache-control": "private", "server": "cloudflare", "strict-transport-security": "max-age=31536000", "content-security-policy": "frame-ancestors 'self'", "x-frame-options": "SAMEORIGIN", "x-wf-region": "us-east-1", "alt-svc": "h3=\":443\"; ma=86400", "age": "293432", "last-modified": "Wed, 05 Aug 2026 22:28:27 GMT", "link": "; rel=preconnect; crossorigin, ; rel=preload; as=style; crossorigin; integrity=\"sha384-APgeB+STrEOjUN9RqDJPSB/bTl8Jo9owLn6Had4Sof1bX3dX/NR2dmjRcBg6k5lo\", ; rel=preload; as=style; crossorigin; integrity=\"sha384-wt+TjEYuMPhB6JRPS12M38LguGr5Bl9O50bFUcShThgzjIsbu0NQR2TTNo6LCqJ1\", ; rel=preconnect, ; rel=preconnect; crossorigin, ; rel=preconnect; crossorigin, ; rel=preconnect, ; rel=preload; as=style", "vary": "accept-encoding", "surrogate-control": "max-age=432000", "surrogate-key": "www.teachable.com 687904fb2b26c434698c47e9 pageId:68b18a352897a262d4000b50 69230c78673c4b16cc3a1211 697b7a305a240a68d66931b5", "x-lambda-id": "5cb4b16d-fe02-4ee8-aab1-b02441ba0fe5" }, "security_checks": { "strict-transport-security": true, "content-security-policy": true, "x-content-type-options": false, "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": "cloudflare", "powered_by": "" }, "webpage": { "url": "https://www.teachable.com/", "title": "Teachable — Build & Sell Online Courses, Coaching, Memberships & More", "description": "Join 150,000+ creators & businesses using the top online course platform to sell courses, coaching, and digital products. Start for free.", "success": true, "error": "", "status": 200 }, "network": { "198.202.211.1": { "success": false, "country": "", "region": "", "city": "", "asn": "", "organization": "", "isp": "" } }, "smtp": { "host": "alt3.aspmx.l.google.com", "ports": [ { "port": 25, "open": false, "time_ms": 0.9, "banner": "", "error": "Network is unreachable" }, { "port": 465, "open": false, "time_ms": 4018.8, "banner": "", "error": "Connection timed out" }, { "port": 587, "open": false, "time_ms": 4021.3, "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": 136.08 }