import requests
url = "https://api.sendpost.io/api/v1/subaccount/domain/<domain_id>"
headers = {
    "accept": "application/json",
    "X-SubAccount-ApiKey": "<subaccount_api_key>"
}
response = requests.get(url, headers=headers)
print(response.json())

{
  "id": 117,
  "name": "piedpiper.com",
  "dkim": {
    "host": "1587987845._domainkey.hooli.com",
    "type": "TXT",
    "textValue": "v=DKIM1;k=rsa;s=email;h=sha256;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDsGMUVM1bqebA0bgtf0HQ6P/FZJy42k/OHP0OgVv4WMSsHOvCFre1/6d1GTx3ldeJf612K3L7wV4iJfDMh2FEpuQ+z+pOro3FarWuawoiJbBudgQQ8rResnZ4Sg3W1Zr3tcZgBCEQ9WoLDv/B2dd01p3ZJ40hsco+Fw75Ldnrd3wIDAQAB"
  },
  "returnPath": {
    "host": "sp-bounces.hooli.com",
    "type": "CNAME",
    "textValue": "sp.sendpost.email"
  },
  "track": {
    "host": "track.hooli.com",
    "type": "CNAME",
    "textValue": "api.sendpost.io"
  },
  "dmarc": {
    "host": "_dmarc.hooli.com",
    "type": "TXT",
    "textValue": "v=DMARC1; p=none;"
  },
  "dkimConfig": "<string>",
  "dkimVerified": false,
  "dmarcVerified": false,
  "returnPathVerified": false,
  "trackVerified": true,
  "created": 1567512491587205000
}