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

# Send emails using Retool with SMTP

> Learn how to integrate Retool with Resend SMTP.

### Prerequisites

Before you start, you'll need:

* A Resend [API key](/docs/create-an-api-key)
* A [verified domain](/docs/add-a-domain)

## Guide

**1. Get the Resend SMTP credentials**

When configuring your SMTP integration, you'll need to use the following credentials:

* **Host**: `smtp.resend.com`
* **Port**: `465`
* **Username**: `resend`
* **Password**: `YOUR_API_KEY`

**2. Integrate with Retool SMTP**

Log into your [Retool](https://retool.com) account and create a new SMTP Resource.

1. Go to **Resources** and click **Create New**

![Retool SMTP - Create new Resources](https://mintcdn.com/resend/OWNnQaVDyqcGyhhN/images/retool-smtp-1.png?fit=max\&auto=format\&n=OWNnQaVDyqcGyhhN\&q=85\&s=c6edda6c2512e895bfec5b7e47627d96)

2. Search for **SMTP** and select it

![Retool SMTP - Search for SMTP](https://mintcdn.com/resend/OWNnQaVDyqcGyhhN/images/retool-smtp-2.png?fit=max\&auto=format\&n=OWNnQaVDyqcGyhhN\&q=85\&s=b95716d79754f6d2f8cedd6522d8e8f8)

3. Add name and SMTP credentials

![Retool SMTP - Add SMTP credentials](https://mintcdn.com/resend/OWNnQaVDyqcGyhhN/images/retool-smtp-3.png?fit=max\&auto=format\&n=OWNnQaVDyqcGyhhN\&q=85\&s=cbd6221e4b03dfc909f00f966afc4a2a)