{
 "metric": "mx-rdns",
 "segment": "gb-micro",
 "anchor": "company",
 "label": "UK micro companies",
 "population": "UK micro companies",
 "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": 131,
  "qf_pct": 4.58,
  "ci": [
   2.12,
   9.63
  ],
  "dist": {
   "present": 95.42,
   "absent": 4.58
  },
  "snapshot": "uk-companies-house-per600-seed20260728"
 },
 "series": [
  {
   "day": "2026-08-01",
   "n": 100,
   "qf_pct": 6,
   "ci": [
    2.78,
    12.48
   ],
   "dist": {
    "present": 94,
    "absent": 6
   },
   "snapshot": "uk-companies-house-per300-seed20260728"
  },
  {
   "day": "2026-08-02",
   "n": 100,
   "qf_pct": 6,
   "ci": [
    2.78,
    12.48
   ],
   "dist": {
    "absent": 6,
    "present": 94
   },
   "snapshot": "uk-companies-house-per300-seed20260728"
  },
  {
   "day": "2026-08-04",
   "n": 131,
   "qf_pct": 5.34,
   "ci": [
    2.61,
    10.62
   ],
   "dist": {
    "present": 94.66,
    "absent": 5.34
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  },
  {
   "day": "2026-08-05",
   "n": 131,
   "qf_pct": 4.58,
   "ci": [
    2.12,
    9.63
   ],
   "dist": {
    "present": 95.42,
    "absent": 4.58
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  },
  {
   "day": "2026-08-07",
   "n": 132,
   "qf_pct": 5.3,
   "ci": [
    2.59,
    10.54
   ],
   "dist": {
    "present": 94.7,
    "absent": 5.3
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  },
  {
   "day": "2026-08-14",
   "n": 131,
   "qf_pct": 4.58,
   "ci": [
    2.12,
    9.63
   ],
   "dist": {
    "present": 95.42,
    "absent": 4.58
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  }
 ],
 "license": "CC BY 4.0",
 "source": "https://quietfailures.com/datasets/mx-rdns/gb-micro"
}