> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://mailchimp.com/developer/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://mailchimp.com/developer/_mcp/server.

# List sender domains

POST https://mandrillapp.com/api/1.4/senders/domains
Content-Type: application/json

Returns the sender domains that have been added to this account.

Reference: https://mailchimp.com/developer/transactional/api/senders/domains

## Request

### Body (application/json)

This endpoint expects a SendersDomainsRequest.

- `key` (string, required) — A valid Mandrill API key

## Response

### 200

Success

- `list of SendersSenderDomain`

## Errors

### 401 Unauthorized Error

Invalid or missing API key.

- `status` (string, required) — Status of the response, typically "error"
- `code` (enum, required) — Numeric error code
  - Allowed values: `401`
- `name` (enum, required) — Machine-friendly error name
  - Allowed values: `Invalid_Key`
- `message` (string, required) — Human-readable error message

### 500 Internal Server Error

An unexpected internal server error occurred.

- `status` (string, required) — Status of the response, typically "error"
- `code` (integer, required) — Numeric error code
- `name` (string, required) — Machine-friendly error name
- `message` (string, required) — Human-readable error message

## Types

### SendersSenderDomain

A domain used for sending by the account, including verification status.

- `domain` (string, optional)
- `created_at` (string, optional) — The date and time that the sending domain was first seen.
- `last_tested_at` (string, optional) — The date and time that the sending domain was last tested.
- `spf` (VerificationDetail, optional) — Details about the domain's SPF record.
- `dkim` (VerificationDetail, optional) — Details about the domain's DKIM record.
- `dkim2` (VerificationDetail, optional) — Details about the domain's second DKIM record.
- `dmarc` (DmarcDetail, optional) — Details about the domain's DMARC record.
- `verified_at` (string, optional) — The date and time that the sending domain was verified.
- `valid_signing` (boolean, optional) — Whether this domain can be used to sign messages.
- `verify_txt_key` (string, optional) — The key for the TXT record used to verify the domain.

### VerificationDetail

Details about the verification status of a domain.

- `valid` (boolean, optional) — Whether this verification is valid.
- `valid_after` (string, optional) — The date and time that this verification was last tested.
- `error` (string, optional) — An error message indicating why the verification failed.

### DmarcDetail

Details about the DMARC status of a domain.

- `valid` (boolean, optional) — Whether this verification is valid.
- `error` (string, optional) — An error message indicating why the verification failed.

## Examples

**Request**

```json
{
  "key": "ONzNrsmbtNXoIKyfPmjnig"
}
```

**Response**

```json
[
  {
    "domain": "example.com",
    "created_at": "string",
    "last_tested_at": "string",
    "spf": {
      "valid": true,
      "valid_after": "string",
      "error": "string"
    },
    "dkim": {
      "valid": true,
      "valid_after": "string",
      "error": "string"
    },
    "dkim2": {
      "valid": true,
      "valid_after": "string",
      "error": "string"
    },
    "dmarc": {
      "valid": true,
      "error": "string"
    },
    "verified_at": "string",
    "valid_signing": true,
    "verify_txt_key": "string"
  }
]
```

**SDK Code**

```python
import requests

url = "https://mandrillapp.com/api/1.4/senders/domains"

payload = { "key": "ONzNrsmbtNXoIKyfPmjnig" }
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'https://mandrillapp.com/api/1.4/senders/domains';
const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: '{"key":"ONzNrsmbtNXoIKyfPmjnig"}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://mandrillapp.com/api/1.4/senders/domains"

	payload := strings.NewReader("{\n  \"key\": \"ONzNrsmbtNXoIKyfPmjnig\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://mandrillapp.com/api/1.4/senders/domains")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"key\": \"ONzNrsmbtNXoIKyfPmjnig\"\n}"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://mandrillapp.com/api/1.4/senders/domains")
  .header("Content-Type", "application/json")
  .body("{\n  \"key\": \"ONzNrsmbtNXoIKyfPmjnig\"\n}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://mandrillapp.com/api/1.4/senders/domains', [
  'body' => '{
  "key": "ONzNrsmbtNXoIKyfPmjnig"
}',
  'headers' => [
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://mandrillapp.com/api/1.4/senders/domains");
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"key\": \"ONzNrsmbtNXoIKyfPmjnig\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Content-Type": "application/json"]
let parameters = ["key": "ONzNrsmbtNXoIKyfPmjnig"] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://mandrillapp.com/api/1.4/senders/domains")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```