{
 "title": "Email infrastructure of the Tranco top-1M",
 "report_date": "2026-09-07",
 "generated_at": "2026-09-08T10:16:44Z",
 "source": "https://check.live-direct-marketing.online/email-stats/",
 "kpis": {
  "domains_with_mx": 666076,
  "domains_with_spf": 632414,
  "domains_with_dmarc": 473490,
  "dmarc_enforced_pct": 47.13
 },
 "measurements": {
  "dmarc_enforced_pct": {
   "denominator": "domains_with_dmarc",
   "denominator_value": 473490,
   "unit": "percent",
   "definition": "Unique DMARC publishers with p=quarantine/reject and pct=100 (default when absent), using the RFC 7489 series definition.",
   "limitation": "DNS policy publication does not demonstrate successful enforcement by a recipient."
  },
  "protocol_adoption": {
   "mta_sts": {
    "status": "not_measured",
    "adoption_pct": null,
    "adoption_domains": null,
    "reason": "This dataset does not query _mta-sts.<domain>; apex TXT observations do not measure adoption.",
    "next_check": "Query _mta-sts.<domain> and validate the protocol configuration."
   },
   "tls_rpt": {
    "status": "not_measured",
    "adoption_pct": null,
    "adoption_domains": null,
    "reason": "This dataset does not query _smtp._tls.<domain>; apex TXT observations do not measure adoption.",
    "next_check": "Query _smtp._tls.<domain> and validate the protocol configuration."
   },
   "bimi": {
    "status": "not_measured",
    "adoption_pct": null,
    "adoption_domains": null,
    "reason": "This dataset does not query default._bimi.<domain>; apex TXT observations do not measure adoption.",
    "next_check": "Query default._bimi.<domain> and validate the protocol configuration."
   }
  },
  "spf": {
   "status": "partial",
   "scope": "top_level_dns_terms",
   "nested_dependencies_checked": false,
   "headroom": null,
   "evaluation_status": "not_evaluated",
   "limitation": "Static DNS-dependent term counts are not executed DNS requests. Nested dependencies and the evaluated path determine the RFC 7208 limit; headroom is not confirmed.",
   "next_check": "Evaluate the complete SPF chain for the actual sending IP and envelope sender."
  },
  "ptr": {
   "scope": "inbound_mx_addresses",
   "coverage_status": "partial",
   "outbound_delivery_risk": null,
   "fcrdns_status": "not_measured",
   "freshness_max_days": 14,
   "limitation": "Inbound MX addresses need not send mail. PTR observations are separately dated; unknown, stale and incomplete observations do not establish missing PTR. A name outside the study domain is not a forward-confirmed reverse DNS failure.",
   "next_check": "Check current forward and reverse DNS of the actual sending IP.",
   "scan_date": "2026-09-07",
   "checked_at_min": "2026-07-27 08:34:07",
   "checked_at_max": "2026-09-08 09:45:24",
   "coverage": {
    "hosts_total": 375525,
    "hosts_cached": 366499,
    "hosts_not_cached": 9026,
    "hosts_fresh": 340943,
    "hosts_stale": 25508,
    "hosts_legacy": 25556,
    "hosts_address_unresolved": 14906,
    "hosts_complete": 216545,
    "hosts_partial": 109215,
    "hosts_no_data": 49765,
    "domains_total": 666076,
    "domains_complete": 451958,
    "domains_partial": 177990,
    "domains_no_data": 36128
   },
   "domain_denominator": "domains with complete fresh PTR evidence for every observed MX address",
   "no_ptr_definition": "all addresses of every observed MX have definite negative PTR answers",
   "name_comparison": "all observed PTR names relative to the original study domain; no DNS zone or FCrDNS inferred",
   "history_status": "not_available"
  },
  "company_signals": {
   "basis": "Observed DNS records and dictionary classification, not verified commercial relationships.",
   "limitation": "An SPF include authorizes a sender; it does not prove a purchase, active use or buying intent. DNS changes require confirmation.",
   "no_data": "No matching records in this snapshot is no_data, not a negative company qualification.",
   "next_check": "Confirm the observation with the company and test a real message for delivery."
  }
 },
 "kpi_deltas_pp": {
  "dmarc_enforced_pct": {
   "d1": -0.03,
   "d30": -0.11
  }
 },
 "kpi_deltas_abs": {
  "domains_with_mx": {
   "d1": 572,
   "d30": -4363
  },
  "domains_with_spf": {
   "d1": 419,
   "d30": -2478
  },
  "domains_with_dmarc": {
   "d1": 303,
   "d30": 3416
  }
 },
 "kpi_delta_policy": "deltas use quality==ok points only; window label matches the actual interval (d1 = exactly 1 day, d30 <= 40 days) or the delta is null",
 "dmarc_policy_pct": {
  "none": 235162,
  "quarantine": 116441,
  "reject": 116959
 },
 "provenance": {
  "list_source": "tranco",
  "names_measured": 1089029,
  "domains_resolved": 1060869,
  "domains_with_null_mx": 6258,
  "methodology_version": "2026.09.06",
  "dictionary_hashes": {
   "compliance.py": "76d502287abe",
   "dmarc_vendors.py": "8c195eb564fc",
   "domain_match.py": "8411162f72b7",
   "esps.py": "206a79aab417",
   "mx_providers.py": "23fb265346a7",
   "mx_selection.py": "8e9445ccc3e3",
   "ns_providers.py": "cc4f43c6651f",
   "providers_meta.py": "8222adcb331d",
   "saas_meta.py": "10901ef58846",
   "saas_senders.py": "9ffa69056163",
   "tld_regions.py": "61e8bd3dcca8",
   "verification_tokens.py": "6ba8313e55ab"
  }
 },
 "dmarc_maturity": {
  "total_with_dmarc": 473490,
  "without_rua": 169924,
  "without_rua_pct": 35.89,
  "none_without_rua": 116365,
  "none_without_rua_pct": 24.58,
  "rua_unparseable": 941,
  "rua_unparseable_pct": 0.2,
  "ruf_without_rua": 4548,
  "rua_external_vendor_only": 172075,
  "rua_external_vendor_only_pct": 36.34,
  "maturity": {
   "enforcing": 233400,
   "monitoring": 118876,
   "inert": 116286,
   "invalid": 4928
  },
  "maturity_pct": {
   "enforcing": 49.29,
   "monitoring": 25.11,
   "inert": 24.56,
   "invalid": 1.04
  },
  "enforced_dmarcbis": 233400,
  "enforced_dmarcbis_pct": 49.29,
  "with_np": 387,
  "with_np_pct": 0.08,
  "with_psd": 88,
  "top_rua_vendors": [
   {
    "vendor": "Self-hosted / Other",
    "domains": 218213,
    "pct": 46.09
   },
   {
    "vendor": "Cloudflare DMARC",
    "domains": 27792,
    "pct": 5.87
   },
   {
    "vendor": "Valimail",
    "domains": 14136,
    "pct": 2.99
   },
   {
    "vendor": "Brevo (ex-Sendinblue)",
    "domains": 13205,
    "pct": 2.79
   },
   {
    "vendor": "Proofpoint EFD",
    "domains": 12453,
    "pct": 2.63
   },
   {
    "vendor": "dmarcian",
    "domains": 10051,
    "pct": 2.12
   },
   {
    "vendor": "Postmark DMARC",
    "domains": 7302,
    "pct": 1.54
   },
   {
    "vendor": "DMARC Analyzer",
    "domains": 6796,
    "pct": 1.44
   },
   {
    "vendor": "DMARC Advisor",
    "domains": 3091,
    "pct": 0.65
   },
   {
    "vendor": "DMARC Digests",
    "domains": 2820,
    "pct": 0.6
   },
   {
    "vendor": "PowerDMARC",
    "domains": 2415,
    "pct": 0.51
   },
   {
    "vendor": "Agari (Fortra)",
    "domains": 2193,
    "pct": 0.46
   },
   {
    "vendor": "URIports",
    "domains": 2132,
    "pct": 0.45
   },
   {
    "vendor": "DMARCLY",
    "domains": 1876,
    "pct": 0.4
   },
   {
    "vendor": "Barracuda",
    "domains": 1514,
    "pct": 0.32
   },
   {
    "vendor": "Google Workspace",
    "domains": 972,
    "pct": 0.21
   },
   {
    "vendor": "EasyDMARC",
    "domains": 832,
    "pct": 0.18
   },
   {
    "vendor": "MailHardener",
    "domains": 714,
    "pct": 0.15
   },
   {
    "vendor": "Red Sift OnDMARC",
    "domains": 569,
    "pct": 0.12
   },
   {
    "vendor": "Cisco Secure Email",
    "domains": 398,
    "pct": 0.08
   },
   {
    "vendor": "Validity (Return Path)",
    "domains": 302,
    "pct": 0.06
   },
   {
    "vendor": "Microsoft 365",
    "domains": 290,
    "pct": 0.06
   },
   {
    "vendor": "Netcraft",
    "domains": 286,
    "pct": 0.06
   },
   {
    "vendor": "TDMARC",
    "domains": 212,
    "pct": 0.04
   },
   {
    "vendor": "MXToolbox",
    "domains": 38,
    "pct": 0.01
   }
  ]
 },
 "classification_coverage": {
  "mx_vendor_attributed_domains": 442071,
  "mx_vendor_attributed_pct": 66.37,
  "mx_self_hosted_domains": 150319,
  "mx_self_hosted_pct": 22.57,
  "mx_unresolved_domains": 73686,
  "mx_unresolved_pct": 11.06,
  "spf_include_occurrences": 1056036,
  "spf_classified_occurrences": 869117,
  "spf_classified_pct": 82.3,
  "spf_unknown_occurrences": 186919,
  "spf_unique_unknown_targets": 82217,
  "spf_domains_with_includes": 511757,
  "spf_domains_fully_classified": 368296,
  "spf_domains_fully_classified_pct": 71.97
 },
 "top_mailbox_providers": [
  {
   "name": "Self-Hosted",
   "share_pct": 22.57,
   "delta_1d_pp": -0.01,
   "delta_30d_pp": -0.19
  },
  {
   "name": "Google Workspace",
   "share_pct": 21.65,
   "delta_1d_pp": -0.01,
   "delta_30d_pp": -0.01
  },
  {
   "name": "Microsoft 365",
   "share_pct": 16.95,
   "delta_1d_pp": 0.02,
   "delta_30d_pp": 0.19
  },
  {
   "name": "Unknown / Other",
   "share_pct": 6.59,
   "delta_1d_pp": -0.01,
   "delta_30d_pp": -0.17
  },
  {
   "name": "Generic / unmatched (mx*.*)",
   "share_pct": 2.53,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.02
  },
  {
   "name": "Proofpoint",
   "share_pct": 1.89,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.03
  },
  {
   "name": "Generic / unmatched (mail.*)",
   "share_pct": 1.78,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.01
  },
  {
   "name": "Cloudflare Email Routing",
   "share_pct": 1.73,
   "delta_1d_pp": 0.01,
   "delta_30d_pp": 0.06
  },
  {
   "name": "Yandex 360",
   "share_pct": 1.61,
   "delta_1d_pp": 0.01,
   "delta_30d_pp": -0.03
  },
  {
   "name": "Mimecast",
   "share_pct": 1.46,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.04
  },
  {
   "name": "Hostinger",
   "share_pct": 1.3,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.06
  },
  {
   "name": "Namecheap Email Forwarding",
   "share_pct": 1.11,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.21
  },
  {
   "name": "Zoho Mail",
   "share_pct": 1.04,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.02
  },
  {
   "name": "QQ Mail (Tencent)",
   "share_pct": 0.81,
   "delta_1d_pp": 0.01,
   "delta_30d_pp": -0.01
  },
  {
   "name": "GoDaddy",
   "share_pct": 0.79,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.02
  },
  {
   "name": "OVH Mail",
   "share_pct": 0.77,
   "delta_1d_pp": 0.01,
   "delta_30d_pp": 0.04
  },
  {
   "name": "Amazon SES (inbound)",
   "share_pct": 0.68,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": null
  },
  {
   "name": "1&1 IONOS",
   "share_pct": 0.67,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.03
  },
  {
   "name": "Mail.ru for Business",
   "share_pct": 0.53,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "Barracuda",
   "share_pct": 0.5,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.02
  }
 ],
 "top_esps": [
  {
   "name": "Amazon SES",
   "share_pct": 6.14,
   "delta_1d_pp": 0.01,
   "delta_30d_pp": 0.01
  },
  {
   "name": "SendGrid (Twilio)",
   "share_pct": 4.61,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.06
  },
  {
   "name": "Mailgun",
   "share_pct": 3.99,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.05
  },
  {
   "name": "Zendesk",
   "share_pct": 3.74,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.03
  },
  {
   "name": "Mailchimp",
   "share_pct": 3.56,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.06
  },
  {
   "name": "Mandrill",
   "share_pct": 3.24,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.05
  },
  {
   "name": "HubSpot",
   "share_pct": 3.09,
   "delta_1d_pp": 0.01,
   "delta_30d_pp": -0.03
  },
  {
   "name": "Salesforce",
   "share_pct": 2.53,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.05
  },
  {
   "name": "Mailjet (Sinch)",
   "share_pct": 2.11,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "Cloudflare Email Routing",
   "share_pct": 1.91,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.05
  },
  {
   "name": "Brevo (ex-Sendinblue)",
   "share_pct": 1.46,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.02
  },
  {
   "name": "Mimecast",
   "share_pct": 1.34,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.05
  },
  {
   "name": "Namecheap Forwarding",
   "share_pct": 1.21,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.23
  },
  {
   "name": "MailChannels",
   "share_pct": 1.03,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.05
  },
  {
   "name": "MailerLite",
   "share_pct": 1.02,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": null
  },
  {
   "name": "Proofpoint",
   "share_pct": 0.92,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.01
  },
  {
   "name": "Elastic Email",
   "share_pct": 0.7,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "Unisender (RU)",
   "share_pct": 0.58,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.01
  },
  {
   "name": "Constant Contact",
   "share_pct": 0.56,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.01
  },
  {
   "name": "Campaign Monitor",
   "share_pct": 0.55,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  }
 ],
 "top_saas_senders": [
  {
   "name": "Shopify",
   "share_pct": 0.87,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.03
  },
  {
   "name": "Pardot (Salesforce)",
   "share_pct": 0.74,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.03
  },
  {
   "name": "CodeTwo Email Signatures 365",
   "share_pct": 0.7,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "KnowBe4",
   "share_pct": 0.53,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.02
  },
  {
   "name": "Statuspage (Atlassian)",
   "share_pct": 0.32,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.01
  },
  {
   "name": "Trustpilot",
   "share_pct": 0.29,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.01
  },
  {
   "name": "BigCommerce",
   "share_pct": 0.29,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.02
  },
  {
   "name": "Firebase (Google)",
   "share_pct": 0.29,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "Atlassian (Jira/Confluence)",
   "share_pct": 0.28,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "Lark / Feishu",
   "share_pct": 0.2,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.01
  },
  {
   "name": "NetSuite (Oracle)",
   "share_pct": 0.18,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "Sage Intacct",
   "share_pct": 0.18,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "Qualtrics",
   "share_pct": 0.17,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "Oracle Cloud Email",
   "share_pct": 0.17,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "WordPress.com / WP Cloud",
   "share_pct": 0.16,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "SAP SuccessFactors",
   "share_pct": 0.15,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "Docebo (LMS)",
   "share_pct": 0.14,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.01
  },
  {
   "name": "Oracle Cloud",
   "share_pct": 0.13,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "Zoho Books",
   "share_pct": 0.11,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": 0.0
  },
  {
   "name": "AFAS",
   "share_pct": 0.1,
   "delta_1d_pp": 0.0,
   "delta_30d_pp": -0.01
  }
 ],
 "signals_30d": {
  "up": [
   {
    "kind": "mailbox",
    "name": "Microsoft 365",
    "share_pct": 16.95,
    "delta_30d_pp": 0.19
   },
   {
    "kind": "mailbox",
    "name": "Cloudflare Email Routing",
    "share_pct": 1.73,
    "delta_30d_pp": 0.06
   },
   {
    "kind": "mailbox",
    "name": "Hostinger",
    "share_pct": 1.3,
    "delta_30d_pp": 0.06
   },
   {
    "kind": "esp",
    "name": "Cloudflare Email Routing",
    "share_pct": 1.91,
    "delta_30d_pp": 0.05
   },
   {
    "kind": "mailbox",
    "name": "OVH Mail",
    "share_pct": 0.77,
    "delta_30d_pp": 0.04
   }
  ],
  "down": [
   {
    "kind": "esp",
    "name": "Namecheap Forwarding",
    "share_pct": 1.21,
    "delta_30d_pp": -0.23
   },
   {
    "kind": "mailbox",
    "name": "Namecheap Email Forwarding",
    "share_pct": 1.11,
    "delta_30d_pp": -0.21
   },
   {
    "kind": "mailbox",
    "name": "Self-Hosted",
    "share_pct": 22.57,
    "delta_30d_pp": -0.19
   },
   {
    "kind": "esp",
    "name": "Mailchimp",
    "share_pct": 3.56,
    "delta_30d_pp": -0.06
   },
   {
    "kind": "esp",
    "name": "SendGrid (Twilio)",
    "share_pct": 4.61,
    "delta_30d_pp": -0.06
   }
  ]
 },
 "change_feed": {
  "summary": {
   "scan_today": "2026-09-07",
   "scan_prev": "2026-09-06",
   "total_events": 600,
   "by_severity": {
    "good": 107,
    "bad": 60,
    "info": 441
   }
  },
  "html": "https://check.live-direct-marketing.online/email-stats/alerts.html",
  "json": "https://check.live-direct-marketing.online/email-stats/alerts.json",
  "atom": "https://check.live-direct-marketing.online/email-stats/alerts.atom"
 },
 "files": {
  "history_timeseries": "https://check.live-direct-marketing.online/email-stats/history.json",
  "archive_index": "https://check.live-direct-marketing.online/email-stats/archive.json",
  "domain_registry_csv_gz": "https://check.live-direct-marketing.online/email-stats/domains.csv.gz",
  "unmatched_mx_top1000_csv": "https://check.live-direct-marketing.online/email-stats/long_tail_top1000.csv",
  "classification_candidate_clusters_csv": "https://check.live-direct-marketing.online/email-stats/classification-candidates.csv"
 },
 "methodology": "https://check.live-direct-marketing.online/email-stats/#methodology",
 "llms_txt": "https://check.live-direct-marketing.online/email-stats/llms.txt",
 "mcp_endpoint": {
  "url": "https://check.live-direct-marketing.online/email-stats/mcp",
  "transport": "streamable-http",
  "auth": "none",
  "tools": [
   "latest_stats",
   "domain_lookup",
   "list_snapshots",
   "archive_snapshot",
   "movers",
   "alerts",
   "deep_dive"
  ]
 },
 "attribution": "Data derived from OpenINTEL (University of Twente / SURFnet / SIDN Labs) forward-DNS Tranco snapshots. Aggregates only; raw data not redistributed. Cite this page when reusing the numbers.",
 "contact": "support@live-direct-marketing.online"
}