# Send emails with Base44 and Resend

[Base44](https://base44.com/) is a platform for building apps with AI. You can add Resend in a Base44 project by asking the chat to add email sending with Resend.

:::callout{intent="info"}
This integration requires backend functions, a feature available only on
Builder tier and above. Learn more about [Base44
pricing](https://base44.com/pricing).
:::

## Guide

:::::steps
::::step{title="Add the Resend integration in Base44"}
**If starting a new app:**

1. Click **Integration** in the top nav.
2. Search for **Resend**, select it, and choose **Use This Integration**.

![Resend Integration page](../img/site-assets/mintcdn.com/resend/ABWmVTZIHGIFNTFD/images/base44-integration-13o2anp.png)

**If adding Resend to an existing app:**

1. Enable backend functions.
2. Ask the chat: "Add the Resend email integration to my app. Prompt me to provide the API key and send a welcome email to new users."

:::callout{intent="note"}
See the [Base44
documenation](https://docs.base44.com/Integrations/Resend-integration) for
more information.
:::
::::

:::step{title="Add your Resend API key"}
However you add Resend to your project, you'll need to add a Resend API key, which you can create in the [Resend Dashboard](https://resend.com/api-keys). Do not share your API key with others or expose it in the browser or other client-side code.

Copy the API key and paste it into the **RESEND\_API\_KEY** field in Base44.

![Adding your Resend API key to Base44](../img/site-assets/mintcdn.com/resend/ABWmVTZIHGIFNTFD/images/base44-integration-1-1f5p2ln.png)
:::

:::step{title="Add a custom domain to your Resend account"}
By default, you can only send emails to your own email address.

To send emails to other email addresses:

1. Add a [custom domain to your Resend account](/guides/get-started-add-a-domain).
2. Add the custom domain to the `from` field in the `resend` function in the Base44 backend function (or ask the chat to update these fields).

Get more help adding a custom domain in [Resend's documentation](/guides/learn-dashboard-domains-introduction).
:::
:::::

## Related pages

- [How to add the Resend integration to your Anything project](./build-with-ai-anything-integration.md)
- [Send emails with Lovable and Resend](./build-with-ai-lovable-integration.md)
- [Send emails with v0 and Resend](./build-with-ai-v0-integration.md)
- [Send emails with Bolt.new and Resend](./build-with-ai-bolt-new-integration.md)
- [Send emails with Replit and Resend](./build-with-ai-replit-integration.md)
- [Send emails with Leap and Resend](./build-with-ai-leap-new-integration.md)
- [Send emails with Appwrite and Resend](./build-with-ai-appwrite-integration.md)

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