{
  "name": "SURBL listings and blocklist bounces by estate",
  "page": "https://warminboxes.com/research/surbl-blocklist-study",
  "fieldwork": "30 days to 29 July 2026",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "WarmInboxes.com",
  "generated": "2026-11-11",
  "published": "7 October 2026",
  "notes": [
    "bounces counts blocklist bounces attributed to the estate over the window. The third-party SMTP row genuinely reads zero."
  ],
  "estates": [
    {
      "estate": "Azure, estate A",
      "owned": true,
      "domains": 524,
      "listed": 50,
      "listed_pct": 9.542,
      "sends": 1118182,
      "bounces": 162,
      "bounce_share_pct": 0.0145
    },
    {
      "estate": "Azure, estate B",
      "owned": true,
      "domains": 499,
      "listed": 82,
      "listed_pct": 16.4329,
      "sends": 912540,
      "bounces": 171,
      "bounce_share_pct": 0.0187
    },
    {
      "estate": "Google, estate A",
      "owned": true,
      "domains": 415,
      "listed": 226,
      "listed_pct": 54.4578,
      "sends": 53829,
      "bounces": 5,
      "bounce_share_pct": 0.0093
    },
    {
      "estate": "Google, estate B",
      "owned": true,
      "domains": 99,
      "listed": 55,
      "listed_pct": 55.5556,
      "sends": 29862,
      "bounces": 16,
      "bounce_share_pct": 0.0536
    },
    {
      "estate": "Google, bought-in reseller stock",
      "owned": false,
      "domains": 1082,
      "listed": 612,
      "listed_pct": 56.5619,
      "sends": 493428,
      "bounces": 377,
      "bounce_share_pct": 0.0764
    },
    {
      "estate": "Third-party SMTP",
      "owned": false,
      "domains": 198,
      "listed": 195,
      "listed_pct": 98.4848,
      "sends": 268218,
      "bounces": 0,
      "bounce_share_pct": 0
    }
  ]
}