# Mailgun (/docs/v/0.4.0/adapters/mailgun)



<ProviderBadge adapter="mailgun" />

## Before live sends [#before-live-sends]

Create a Mailgun API key for the sending domain and use the base URL for the domain region. EU domains need the EU API base URL; US domains use the default. Verify DNS and sender setup before treating a successful SDK call as production-ready delivery.

```ts
import { createEmailClient } from "@opencoredev/email-sdk";
import { mailgun } from "@opencoredev/email-sdk/mailgun";

const email = createEmailClient({
  adapters: [
    mailgun({
      apiKey: process.env.MAILGUN_API_KEY!,
      domain: process.env.MAILGUN_DOMAIN!,
    }),
  ],
});
```

## Options [#options]

| Option    | Type           | Required | Notes                                                                                              |
| --------- | -------------- | -------- | -------------------------------------------------------------------------------------------------- |
| `apiKey`  | `string`       | Yes      | Mailgun API key.                                                                                   |
| `domain`  | `string`       | Yes      | Sending domain.                                                                                    |
| `baseUrl` | `string`       | No       | Defaults to `https://api.mailgun.net`. Use the EU API base URL if your domain is in the EU region. |
| `fetch`   | `typeof fetch` | No       | Useful for tests or custom runtimes.                                                               |

Mailgun sends attachments as multipart form data. See <a href="/docs/v/0.4.0/adapters/field-support">field support</a> for the full mapping.