{
  "title": "Email deliverability score thresholds to aim for",
  "source": "CaptainDNS",
  "date": "2026-05-29",
  "thresholds": [
    {
      "metric": "Deliverability rate",
      "good": "95-99%",
      "watch": "90-95%",
      "critical": "Below 90%"
    },
    {
      "metric": "Spam complaint rate",
      "good": "Below 0.1%",
      "watch": "0.1-0.3%",
      "critical": "Above 0.3%"
    },
    {
      "metric": "Bounce rate",
      "good": "Below 2%",
      "watch": "2-5%",
      "critical": "Above 5%"
    },
    {
      "metric": "Sender Score (Validity)",
      "good": "Above 80",
      "watch": "70-80",
      "critical": "Below 70"
    },
    {
      "metric": "DMARC policy",
      "good": "p=reject",
      "watch": "p=quarantine",
      "critical": "p=none or missing"
    },
    {
      "metric": "Transport security",
      "good": "MTA-STS enforce or DANE",
      "watch": "MTA-STS testing",
      "critical": "None"
    }
  ]
}