Email Provider

This login mechanism starts by the user providing their email address at the login form. Then a Verification Token is sent to the provided email address. The user then has 24 hours to click the link in the email body to “consume” that token and register their account, otherwise the verification token will expire and they will have to request a new one.

💡

An Email Provider can be used with both JSON Web Tokens and database session, whichever you choose, you must still configure a database so that Auth.js can save the verification tokens and look them up when the user attempts to login. It is not possible to enable an email provider without using a database.

Providers

Resend Setup

Database Adapter

Please make sure you’ve setup a database adapter, as mentioned earlier, a database is required for passwordless login to work as verification tokens need to be stored.

Setup Environment Variables

Auth.js will automatically pick up these if formatted like the example above. You can also use a different name for the environment variables if needed, but then you’ll need to pass them to the provider manually.

.env

AUTH_RESEND_KEY=abc123

Setup Provider

Let’s enable Resend as a sign in option in our Auth.js configuration. You’ll have to import the Resend provider from the package and pass it to the providers array we setup earlier in the Auth.js config file:

./auth.ts

import NextAuth from "next-auth"
import Resend from "next-auth/providers/resend"
 
export const { handlers, auth, signIn, signOut } = NextAuth({
  providers: [Resend],
})

/src/routes/plugin@auth.ts

import { QwikAuth$ } from "@auth/qwik"
import Resend from "@auth/qwik/providers/resend"
 
export const { onRequest, useSession, useSignIn, useSignOut } = QwikAuth$(
  () => ({
    providers: [Resend],
  })
)

./src/auth.ts

import SvelteKitAuth from "@auth/sveltekit"
import Resend from "@auth/sveltekit/providers/resend"
 
export const { handle, signIn, signOut } = SvelteKitAuth({
  providers: [Resend],
})

./src/hooks.server.ts

export { handle } from "./auth"

Add Signin Button

Next, we can add a signin button somewhere in your application like the Navbar. This will send an email to the user containing the magic link to sign in.

./components/sign-in.tsx

import { signIn } from "../../auth.ts"
 
export function SignIn() {
  return (
    <form
      action={async (formData) => {
        "use server"
        await signIn("resend", formData)
      }}
    >
      <input type="text" name="email" placeholder="Email" />
      <button type="submit">Signin with Resend</button>
    </form>
  )
}

./components/sign-in.tsx

import { component$ } from "@builder.io/qwik"
import { useSignIn } from "./plugin@auth"
 
export default component$(() => {
  const signInSig = useSignIn()
 
  return (
    <button
      onClick$={() => signInSig.submit({ redirectTo: "/" })}
    >
      SignIn
    </button>
  )
})

src/routes/+page.svelte

<script lang="ts">
  import { SignIn } from "@auth/sveltekit/components"
</script>
 
<div>
  <nav>
    <img src="/img/logo.svg" alt="Company Logo" />
    <SignIn provider="resend" />
  </nav>
</div>

Signin

Start your application, once the user enters their Email and clicks on the signin button, they’ll be redirected to a page that asks them to check their email. When they click on the link in their email, they will be signed in.

Check our Customising magic links emails to learn how to change the look and feel of the emails the user receives to sign in.

For more information on this provider go to the Resend docs page.

Sendgrid Setup

Database Adapter

Please make sure you’ve setup a database adapter, as mentioned earlier, a database is required for passwordless login to work as verification tokens need to be stored.

Setup Environment Variables

.env

AUTH_SENDGRID_KEY=abc123

Setup Provider

Let’s enable Sendgrid as a sign in option in our Auth.js configuration. You’ll have to import the Sendgrid provider from the package and pass it to the providers array we setup earlier in the Auth.js config file:

./auth.ts

import NextAuth from "next-auth"
import Sendgrid from "next-auth/providers/sendgrid"
 
export const { handlers, auth, signIn, signOut } = NextAuth({
  providers: [Sendgrid],
})

/src/routes/plugin@auth.ts

import { QwikAuth$ } from "@auth/qwik"
import Sendgrid from "@auth/qwik/providers/sendgrid"
 
export const { onRequest, useSession, useSignIn, useSignOut } = QwikAuth$(
  () => ({
    providers: [Sendgrid],
  })
)

./src/auth.ts

import SvelteKitAuth from "@auth/sveltekit"
import Sendgrid from "@auth/sveltekit/providers/sendgrid"
 
export const { handle, signIn, signOut } = SvelteKitAuth({
  providers: [Sendgrid],
})

./src/hooks.server.ts

export { handle } from "./auth"

Add Signin Button

Next, we can add a signin button somewhere in your application like the Navbar. This will send an email to the user containing the magic link to sign in.

./components/sign-in.tsx

import { signIn } from "../../auth.ts"
 
export function SignIn() {
  return (
    <form
      action={async (formData) => {
        "use server"
        await signIn("sendgrid", formData)
      }}
    >
      <input type="text" name="email" placeholder="Email" />
      <button type="submit">Signin with Sendgrid</button>
    </form>
  )
}

./components/sign-in.tsx

import { component$ } from "@builder.io/qwik"
import { useSignIn } from "./plugin@auth"
 
export default component$(() => {
  const signInSig = useSignIn()
 
  return (
    <button
      onClick$={() => signInSig.submit({ redirectTo: "/" })}
    >
      SignIn
    </button>
  )
})

src/routes/+page.svelte

<script lang="ts">
  import { SignIn } from "@auth/sveltekit/components"
</script>
 
<div>
  <nav>
    <img src="/img/logo.svg" alt="Company Logo" />
    <SignIn provider="sendgrid" />
  </nav>
</div>

Signin

Check our Customising magic links emails to learn how to change the look and feel of the emails the user receives to sign in.

For more information on this provider go to the Sendgrid docs page.

Nodemailer Setup

Install `nodemailer`

Auth.js does not include nodemailer as a dependency, so you’ll need to install it yourself if you want to use the Nodemailer provider.

npm install nodemailer

pnpm add nodemailer

yarn add nodemailer

bun add nodemailer

You will need access to an SMTP server, ideally from one of the services known to work with nodemailer. Alternatively, Nodemailer does support other transport mechanisms.

Database Adapter

Please make sure you’ve setup a database adapter, as mentioned earlier, a database is required for magic link login to work as verification tokens need to be stored.

SMTP Transport Configuration

There are two ways to configure the SMTP server connection: using a connection string or a configuration object.

.env

EMAIL_SERVER=smtp://username:password@smtp.example.com:587
EMAIL_FROM=noreply@example.com

./auth.ts

import NextAuth from "next-auth"
import Nodemailer from "next-auth/providers/nodemailer"
 
export const { handlers, auth, signIn, signOut } = NextAuth({
  providers: [
    Nodemailer({
      server: process.env.EMAIL_SERVER,
      from: process.env.EMAIL_FROM,
    }),
  ],
})

/src/routes/plugin@auth.ts

import { QwikAuth$ } from "@auth/qwik"
import Nodemailer from "@auth/qwik/providers/nodemailer"
 
export const { onRequest, useSession, useSignIn, useSignOut } = QwikAuth$(
  () => ({
    providers: [
      Nodemailer({
        server: import.meta.env.EMAIL_SERVER,
        from: import.meta.env.EMAIL_FROM,
      }),
    ],
  })
)

./src/auth.ts

import SvelteKitAuth from "@auth/sveltekit"
import Nodemailer from "@auth/sveltekit/providers/nodemailer"
import { env } from "$env/dynamic/prviate"
 
export const { handle, signIn, signOut } = SvelteKitAuth({
  providers: [
    Nodemailer({
      server: env.EMAIL_SERVER,
      from: env.EMAIL_FROM,
    }),
  ],
})

./src/hooks.server.ts

export { handle } from "./auth"

Signin Button

Next, we can add a sign in button somewhere in your application like the Navbar. This will forward the user on to the Auth.js default signin page.

./components/sign-in.tsx

import { signIn } from "../../auth.ts"
 
export function SignIn() {
  return (
    <form
      action={async () => {
        "use server"
        await signIn()
      }}
    >
      <button type="submit">Sign In</button>
    </form>
  )
}

./components/sign-in.tsx

import { component$ } from "@builder.io/qwik"
import { useSignIn } from "./plugin@auth"
 
export default component$(() => {
  const signInSig = useSignIn()
 
  return (
    <button
      onClick$={() => signInSig.submit({ redirectTo: "/" })}
    >
      SignIn
    </button>
  )
})

src/routes/+page.svelte

<script lang="ts">
  import { signIn } from '@auth/sveltekit/client'
</script>
 
<div>
  <nav>
    <img src="/img/logo.svg" alt="Company Logo" />
    <button on:click={signIn}>Signin</button>
  </nav>
</div>

Signin

Start your application, click on the sign in button we just added, and you should see Auth.js built-in sign in page with the option to sign in with your email:

Insert your email and click “Sign in with Email”. You should receive an email from Auth.js, click on it and should be redirected to your application, landing already authenticated.

For more information on this provider go to the Nodemailer docs page.

Postmark Setup

Database Adapter

Please make sure you’ve setup a database adapter, as mentioned earlier, a database is required for passwordless login to work as verification tokens need to be stored.

Setup Environment Variables

.env

AUTH_POSTMARK_KEY=abc123

Setup Provider

Let’s enable Postmark as a sign in option in our Auth.js configuration. You’ll have to import the Postmark provider from the package and pass it to the providers array we setup earlier in the Auth.js config file:

./auth.ts

import NextAuth from "next-auth"
import Postmark from "next-auth/providers/postmark"
 
export const { handlers, auth, signIn, signOut } = NextAuth({
  providers: [Postmark],
})

/src/routes/plugin@auth.ts

import { QwikAuth$ } from "@auth/qwik"
import Postmark from "@auth/qwik/providers/postmark"
 
export const { onRequest, useSession, useSignIn, useSignOut } = QwikAuth$(
  () => ({
    providers: [Postmark],
  })
)

./src/auth.ts

import SvelteKitAuth from "@auth/sveltekit"
import Postmark from "@auth/sveltekit/providers/postmark"
 
export const { handle, signIn, signOut } = SvelteKitAuth({
  providers: [Postmark],
})

./src/hooks.server.ts

export { handle } from "./auth"

Add Signin Button

Next, we can add a signin button somewhere in your application like the Navbar. This will send an email to the user containing the magic link to sign in.

./components/sign-in.tsx

import { signIn } from "../../auth.ts"
 
export function SignIn() {
  return (
    <form
      action={async (formData) => {
        "use server"
        await signIn("postmark", formData)
      }}
    >
      <input type="text" name="email" placeholder="Email" />
      <button type="submit">Signin with Postmark</button>
    </form>
  )
}

./components/sign-in.tsx

import { component$ } from "@builder.io/qwik"
import { useSignIn } from "./plugin@auth"
 
export default component$(() => {
  const signInSig = useSignIn()
 
  return (
    <button
      onClick$={() => signInSig.submit({ redirectTo: "/" })}
    >
      SignIn
    </button>
  )
})

src/routes/+page.svelte

<script lang="ts">
  import { SignIn } from "@auth/sveltekit/components"
</script>
 
<div>
  <nav>
    <img src="/img/logo.svg" alt="Company Logo" />
    <SignIn provider="postmark" />
  </nav>
</div>

Signin

Check our Customising magic links emails to learn how to change the look and feel of the emails the user receives to sign in.

For more information on this provider go to the Postmark docs page.

Loops Setup

Database Adapter

Please make sure you’ve setup a database adapter, as mentioned earlier, a database is required for passwordless login to work as verification tokens need to be stored.

Create your Transactional Email Template on Loops

Loops have provided a super handy guide to help you get started with creating your transactional email template. This provider only passes one data varaiable into the template, url which is the magic link to sign in. This is case sensitive, so make sure you use url in your template.
On the last page of Template creation, you’ll need to copy the TRANSACTIONAL ID. If you skipped this step, don’t worry, you can get this at any from the Template edit page.

Create an API Key on Loops

You’ll need to create an API key to authenticate with Loops. This key should be kept secret and not shared with anyone. You can Generate a key by going to the API Settings Page and clicking Generate. You should name the key something that makes sense to you, like “Auth.js”.

Setup Environment Variables

To implement Loops, you need to set up the following environment variables:

.env

AUTH_LOOPS_KEY=abc123
AUTH_LOOPS_TRANSACTIONAL_ID=def456

Setup Provider

Let’s enable Loops as a sign-in option for our Auth.js configuration. You’ll have to import the Loops provider from the package and pass it to the providers array we set up earlier in the Auth.js config file:

./auth.ts

import NextAuth from "next-auth"
import Loops from "next-auth/providers/loops"
 
export const { handlers, auth, signIn, signOut } = NextAuth({
  providers: [Loops({
    apiKey: process.env.AUTH_LOOPS_KEY,
    transactionalId: process.env.AUTH_LOOPS_TRANSACTIONAL_ID,
  })]
})

./src/auth.ts

 
import SvelteKitAuth from "@auth/sveltekit"
import Loops from "@auth/sveltekit/providers/loops"
import { AUTH_LOOPS_KEY, AUTH_LOOPS_TRANSACTIONAL_ID} from "$env/static/private"
 
export const { handle, signIn, signOut } = SvelteKitAuth({
  providers: [
      Loops({
      apiKey: AUTH_LOOPS_KEY,
      transactionalId: AUTH_LOOPS_TRANSACTIONAL_ID,
    })
  ]
})

./src/hooks.server.ts

 
export { handle } from "./auth"

Add Signin Button

Next, we add a signin button somewhere in your application like the Navbar. This will send an email to the user containing the magic link to sign in.

./components/sign-in.tsx

import { signIn } from "../../auth.ts"
 
export function SignIn() {
  return (
    <form 
      action={async (formData) => {
        "use server"
        await signIn("loops", formData)
      }}
    >
      <input type="text" name="email" placeholder="Email" />
      <button type="submit">Sign in with Loops</button>
    </form>
  )
}

src/routes/+page.svelte

 
<script lang="ts">
  import { SignIn } from "@auth/sveltekit/components"
</script>
 
<div>
  <nav>
    <img src="/img/logo.svg" alt="Company Logo" />
    <SignIn provider="loops"/>
  </nav>
</div>

Signin

Start your application, click on the signin button we just added, and you should see Auth.js built-in sign in page with the option to sign in with your email. A user can enter their email, click “Sign in with Loops”, and receive their beautifully formatted signin email. Clicking on the link in the email will redirect the user to your application, landing already authenticated!

OAuth Credentials

Email Provider

Providers

Resend Setup

Database Adapter

Setup Environment Variables

Setup Provider

Add Signin Button

Signin

Sendgrid Setup

Database Adapter

Setup Environment Variables

Setup Provider

Add Signin Button

Signin

Nodemailer Setup

Install `nodemailer`

Database Adapter

SMTP Transport Configuration

Signin Button

Signin

Postmark Setup

Database Adapter

Setup Environment Variables

Setup Provider

Add Signin Button

Signin

Loops Setup

Database Adapter

Create your Transactional Email Template on Loops

Create an API Key on Loops

Setup Environment Variables

Setup Provider

Add Signin Button

Signin

About Auth.js

Download

Acknowledgements

Email Provider

Providers

Resend Setup

Database Adapter

Setup Environment Variables

Setup Provider

Add Signin Button

Signin

Sendgrid Setup

Database Adapter

Setup Environment Variables

Setup Provider

Add Signin Button

Signin

Nodemailer Setup

Install nodemailer

Database Adapter

SMTP Transport Configuration

Signin Button

Signin

Postmark Setup

Database Adapter

Setup Environment Variables

Setup Provider

Add Signin Button

Signin

Loops Setup

Database Adapter

Create your Transactional Email Template on Loops

Create an API Key on Loops

Setup Environment Variables

Setup Provider

Add Signin Button

Signin

About Auth.js

Download

Acknowledgements

Install `nodemailer`