{
 "metric": "mx-rdns",
 "segment": "global",
 "anchor": "domain",
 "label": "global domains",
 "population": "domains worldwide",
 "states": [
  "present",
  "absent"
 ],
 "quiet_failure_states": [
  "absent"
 ],
 "measurement": "Tier 0. Resolve the MX, then PTR on the reversed address (bounded DNS query). Denominator: `has_mx`.",
 "why_it_matters": "Missing reverse DNS is a classic quiet failure — nothing breaks visibly, but receiving mail systems downgrade or reject on it, so outbound deliverability degrades in ways that surface as \"our email sometimes doesn't arrive\".",
 "limits": null,
 "data_tier": "smtp",
 "population_predicate": "has_mx",
 "entity_type": "domain",
 "kind": "failure",
 "latest": {
  "day": "2026-08-14",
  "n": 1462,
  "qf_pct": 5.13,
  "ci": [
   4.11,
   6.38
  ],
  "dist": {
   "present": 94.87,
   "absent": 5.13
  },
  "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
 },
 "series": [
  {
   "day": "2026-08-01",
   "n": 1468,
   "qf_pct": 5.18,
   "ci": [
    4.16,
    6.43
   ],
   "dist": {
    "absent": 5.18,
    "present": 94.82
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-02",
   "n": 1468,
   "qf_pct": 4.97,
   "ci": [
    3.97,
    6.21
   ],
   "dist": {
    "present": 95.03,
    "absent": 4.97
   },
   "snapshot": "common-crawl-domain-stratified-c150-g2500-seed20260729"
  },
  {
   "day": "2026-08-04",
   "n": 1469,
   "qf_pct": 5.24,
   "ci": [
    4.21,
    6.5
   ],
   "dist": {
    "present": 94.76,
    "absent": 5.24
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-05",
   "n": 1466,
   "qf_pct": 5.18,
   "ci": [
    4.16,
    6.44
   ],
   "dist": {
    "present": 94.82,
    "absent": 5.18
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-07",
   "n": 1464,
   "qf_pct": 5.05,
   "ci": [
    4.05,
    6.3
   ],
   "dist": {
    "present": 94.95,
    "absent": 5.05
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  },
  {
   "day": "2026-08-14",
   "n": 1462,
   "qf_pct": 5.13,
   "ci": [
    4.11,
    6.38
   ],
   "dist": {
    "present": 94.87,
    "absent": 5.13
   },
   "snapshot": "common-crawl-domain-stratified-c400-g2500-seed20260729"
  }
 ],
 "license": "CC BY 4.0",
 "source": "https://quietfailures.com/datasets/mx-rdns/global"
}