> ## Documentation Index
> Fetch the complete documentation index at: https://auth0.generaltranslation.app/llms.txt
> Use this file to discover all available pages before exploring further.

> Describes how to configure Mailgun as an external SMTP email provider.

# Configure Mailgun as External SMTP Email Provider

Auth0 allows you to configure your own SMTP email provider so you can more completely manage, monitor, and troubleshoot your email communications. Auth0's built-in email infrastructure should be used for testing emails only.

## Prerequisites

* To ensure that emails can be sent from Auth0 to your SMTP, open ports and allow inbound connections from specific IP addresses. To update the list of IPs, navigate to [Dashboard > Branding > Email Provider](https://manage.auth0.com/#/branding/email_provider). See [Add IP Addresses to AllowList](/docs/secure/security-guidance/data-security/allowlist) for details.
* You must have a [Mailgun](https://mailgun.com) account.

## Configure Mailgun

1. Log in to your [Mailgun](https://mailgun.com).
2. Navigate to Mailgun **Sending > Domains**, and add your custom domain. Mailgun allows sending emails from only verified domains.
3. Navigate to Mailgun **Settings > API Keys**. Your API key was created when you signed up for your account; copy it from **Private API Key**.
4. Navigate to Auth0 [Dashboard > Branding > Email Provider](https://manage.auth0.com/#/branding/email_provider).
5. Activate the **Use my own email provider** toggle.
6. Click the **Mailgun** logo.
7. Provide a **From** email address, enter the **Domain** you previously added to Mailgun, enter the Mailgun **API Key** you previously copied, select your **Region**.
8. Click **Save**.

## Test email

You can now send a test email using the **Send Test Email** button. If you have configured everything correctly, you will receive a confirmation email. If you do not receive an email after a few minutes, please check your [Auth0 logs](https://manage.auth0.com/#/logs) for any failures.

The [Mailgun Dashboard](https://app.mailgun.com/app/dashboard) will now display delivery insights for all emails that have been sent to your users.