curl --request POST \
  --url https://app.sendmux.ai/api/v1/domains/{public_id}/verify \
  --header 'Authorization: Bearer <token>'

{
  "ok": true,
  "data": {
    "status": "verified",
    "ses_dkim_status": "<string>",
    "checks": {
      "mx": true,
      "verification_txt": true,
      "spf": true,
      "dmarc": true
    }
  },
  "meta": {
    "request_id": "req_clxxxxxxxxxxxxxxxxxxxxxxxxx"
  }
}