Send emails using NextAuth with SMTP

Prerequisites

Before you start, you’ll need:

A Resend API key
A verified domain

Guide

Install

Install the NextAuth package.

npm install next-auth

yarn add next-auth

pnpm add next-auth

bun add next-auth

Then, install the Nodemailer package.

npm install nodemailer

yarn add nodemailer

pnpm add nodemailer

bun add nodemailer

Configure SMTP credentials

Add your Resend SMTP crendentials in your application’s .env file:

.env

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

Configure Email Provider

Finally, in your […nextauth].js file (typically located in pages/api/auth), configure the Email provider with your SMTP settings:

index.ts

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
});

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⌘I

​Prerequisites

​Guide

Prerequisites

Guide