# Send emails using NextAuth with SMTP

## Prerequisites

Before you start, you'll need:

- A Resend [API key](/guides/get-started-create-an-api-key)
- A [verified domain](/guides/get-started-add-a-domain)

## Guide

:::::steps
::::step{title="Install"}
Install the [NextAuth](https://next-auth.js.org/getting-started/example#install-nextauth) package.

:::code-group
```bash npm theme={"theme":{"light":"github-light","dark":"vesper"}}
npm install next-auth
```

```bash yarn theme={"theme":{"light":"github-light","dark":"vesper"}}
yarn add next-auth
```

```bash pnpm theme={"theme":{"light":"github-light","dark":"vesper"}}
pnpm add next-auth
```

```bash bun theme={"theme":{"light":"github-light","dark":"vesper"}}
bun add next-auth
```
:::

Then, install the [Nodemailer](https://www.npmjs.com/package/nodemailer) package.

:::code-group
```bash npm theme={"theme":{"light":"github-light","dark":"vesper"}}
npm install nodemailer
```

```bash yarn theme={"theme":{"light":"github-light","dark":"vesper"}}
yarn add nodemailer
```

```bash pnpm theme={"theme":{"light":"github-light","dark":"vesper"}}
pnpm add nodemailer
```

```bash bun theme={"theme":{"light":"github-light","dark":"vesper"}}
bun add nodemailer
```
:::
::::

:::step{title="Configure SMTP credentials"}
Add your Resend SMTP crendentials in your application's `.env` file:

```ini .env theme={"theme":{"light":"github-light","dark":"vesper"}}
EMAIL_SERVER_USER=resend
EMAIL_SERVER_PASSWORD=YOUR_API_KEY
EMAIL_SERVER_HOST=smtp.resend.com
EMAIL_SERVER_PORT=465
EMAIL_FROM=onboarding@resend.dev
```
:::

:::step{title="Configure Email Provider"}
Finally, in your \[...nextauth].js file (typically located in pages/api/auth), configure the Email provider with your SMTP settings:

```js index.ts theme={"theme":{"light":"github-light","dark":"vesper"}}
import NextAuth from 'next-auth';
import EmailProvider from 'next-auth/providers/email';
import nodemailer from 'nodemailer';

export default NextAuth({
  providers: [
    EmailProvider({
      server: {
        host: process.env.EMAIL_SERVER_HOST,
        port: process.env.EMAIL_SERVER_PORT,
        auth: {
          user: process.env.EMAIL_SERVER_USER,
          pass: process.env.EMAIL_SERVER_PASSWORD,
        },
      },
      from: process.env.EMAIL_FROM,
    }),
    // ... other providers as needed
  ],
  // ... any other NextAuth.js configs
});
```
:::
:::::

## Related pages

- [Send emails with SMTP](./get-started-send-with-smtp.md)
- [Send Auth0 transactional emails with Resend](./get-started-send-with-auth0.md)
- [Send emails using Customer.io with SMTP](./get-started-send-with-customer-io-smtp.md)
- [Send emails using Django with SMTP](./get-started-send-with-django-smtp.md)
- [Send emails using Laravel with SMTP](./get-started-send-with-laravel-smtp.md)
- [Send emails using Liferay with SMTP](./get-started-send-with-liferay-smtp.md)
- [Send emails using Nodemailer with SMTP](./get-started-send-with-nodemailer-smtp.md)
- [Send emails using PHPMailer with SMTP](./get-started-send-with-phpmailer-smtp.md)
- [Send emails using Rails with SMTP](./get-started-send-with-rails-smtp.md)
- [Send emails using Retool with SMTP](./get-started-send-with-retool-smtp.md)

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