curl --request PUT \
  --url https://cloudapi.mailercloud.com/v1/domains/{id} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "dkim_selector": "k3"
}
'

{
  "id": "zjAKXb",
  "domain": "example.com",
  "status": "not_verified",
  "open_tracking": false,
  "records": [
    {
      "type": "CNAME",
      "host": "mc.example.com",
      "value": "mc3035n.mlrcloud.com",
      "status": "pending",
      "purpose": "tracking",
      "message": "Add the record to your domain provider"
    },
    {
      "type": "CNAME",
      "host": "k1._domainkey.example.com",
      "value": "dkim.mlrcloud.com",
      "status": "pending",
      "purpose": "dkim",
      "message": "Add the record to your domain provider"
    },
    {
      "type": "CNAME",
      "host": "k2._domainkey.example.com",
      "value": "dkim2.mlrcloud.com",
      "status": "optional",
      "purpose": "dkim2",
      "message": "Add the record to your domain provider"
    },
    {
      "type": "CNAME",
      "host": "img3035n.example.com",
      "value": "img3035n.mlrcloud.com",
      "status": "pending",
      "purpose": "image",
      "message": "Add the record to your domain provider"
    },
    {
      "type": "TXT",
      "host": "_dmarc.example.com",
      "value": "v=DMARC1; p=reject; sp=none; adkim=s; aspf=s; rua=mailto:dmarc@mlrcloud.com; ruf=mailto:dmarc@mlrcloud.com;",
      "status": "pending",
      "purpose": "dmarc",
      "message": "Update the record in your domain provider"
    }
  ],
  "created_at": "2026-10-15 18:32:12"
}