curl --request POST \
  --url https://api.decodahealth.com/admin/mailgun-domain \
  --header 'API-KEY: <api-key>' \
  --header 'Content-Type: application/json' \
  --header 'TENANT: <tenant>' \
  --data '
{
  "domainName": "<string>"
}
'

{
  "id": "<string>",
  "tenantSubDomain": "<string>",
  "domainName": "<string>",
  "isSendingVerified": true,
  "isReceivingVerified": true,
  "createdDate": "2023-11-07T05:31:56Z",
  "smtpLogin": "<string>",
  "dnsRecords": {
    "sendingDnsRecords": [
      {
        "recordType": "<string>",
        "name": "<string>",
        "value": "<string>",
        "priority": "<string>"
      }
    ],
    "receivingDnsRecords": [
      {
        "recordType": "<string>",
        "name": "<string>",
        "value": "<string>",
        "priority": "<string>"
      }
    ],
    "dmarcDnsRecords": [
      {
        "recordType": "<string>",
        "name": "<string>",
        "value": "<string>",
        "priority": "<string>"
      }
    ]
  },
  "updatedDate": "2023-11-07T05:31:56Z",
  "verifiedDate": "2023-11-07T05:31:56Z"
}