# Trigger Sender Domain DNS Check

Requests an asynchronous sender-domain DNS check without sending email. The per-domain cooldown is enforced; during it, returns cooldownActive and the next available time without queueing another check.

## Input schema:

```json
{
  "type": "object",
  "properties": {
    "domainId": {
      "type": "integer",
      "description": "ID of the sender domain to recheck",
      "minimum": 1
    },
    "accountId": {
      "type": [
        "null",
        "integer"
      ],
      "description": "User ID of the account that owns the domain; omit for the account the access token belongs to, or pass a subaccount the token owner may configure",
      "default": null,
      "minimum": 1
    }
  },
  "required": [
    "domainId"
  ],
  "additionalProperties": false
}
```

## Output schema:

```json
{
  "type": "object",
  "required": [
    "accountId",
    "domainId",
    "queued",
    "cooldownActive",
    "lastDnsCheckRequestedAt",
    "nextDnsCheckAvailableAt",
    "settingsUrl"
  ],
  "properties": {
    "accountId": {
      "type": "integer"
    },
    "domainId": {
      "type": "integer"
    },
    "queued": {
      "type": "boolean"
    },
    "cooldownActive": {
      "type": "boolean"
    },
    "lastDnsCheckRequestedAt": {
      "type": "string"
    },
    "nextDnsCheckAvailableAt": {
      "type": "string"
    },
    "settingsUrl": {
      "type": "string"
    }
  }
}
```