# run_deliverability_check (/docs/mcp/tools/run-deliverability-check)

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**Check mailbox DNS** · Changes data

Run the deliverability check for one mailbox: SPF, DKIM and DMARC of its domain, its custom tracking domain and an IP blacklist score. It sends no email; inbox placement is a separate test started from the dashboard, which sends real mail from the mailbox. emailAccountId comes from list_email_accounts. The result is saved on the mailbox. Returns domain and deliverability with overallStatus (excellent, good, warning or critical), spf, dkim, dmarc, customTrackingDomain, issues[] (what to fix), lastChecked and testScore when the blacklist check answered.

| Connection | Account URL, team member URL or OAuth |
| --- | --- |

## Parameters [#parameters]

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `emailAccountId` | `string` | Yes | Mailbox id from list_email_accounts (_id). |

## Tool definition [#tool-definition]

What your assistant receives from `tools/list`:

```json
{
  "name": "run_deliverability_check",
  "title": "Check mailbox DNS",
  "annotations": {
    "title": "Check mailbox DNS",
    "readOnlyHint": false,
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": false
  },
  "inputSchema": {
    "type": "object",
    "properties": {
      "emailAccountId": {
        "type": "string",
        "description": "Mailbox id from list_email_accounts (_id)."
      }
    },
    "required": [
      "emailAccountId"
    ]
  }
}
```