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Auth.js magic links through the Notix relay.

Auth.js sends its email sign-in links through the Nodemailer provider, and Nodemailer speaks SMTP. Give the provider the Notix relay as its server and every magic link goes out from your own domain, tracked like any other send.

The send

Send an email from Auth.js.

Auth.js v5 with the Nodemailer provider (needs an adapter)
import NextAuth from "next-auth";
import Nodemailer from "next-auth/providers/nodemailer";

export const { handlers, auth, signIn, signOut } = NextAuth({
  // adapter: your database adapter; email sign-in stores tokens there.
  providers: [
    Nodemailer({
      server: {
        host: "smtp.usenotix.dev",
        port: 465,
        secure: true,
        auth: { user: "notix", pass: process.env.NOTIX_API_KEY },
      },
      from: "Acme <signin@acme.com>",
    }),
  ],
});

The from address must be on a domain you have verified in Notix. Step by step: the SMTP quickstart and the longer guide to sending email from Next.js.

Environment

One API key, kept on the server.

Create an API key on the API keys page of the Notix console and store it as NOTIX_API_KEY in .env.local beside AUTH_SECRET. Never give it the NEXT_PUBLIC_ prefix: variables with that prefix are built into the browser bundle, and anyone who opens the site can read them.

A Send only key is enough for code that only sends: if it leaks, it cannot read your contacts or delete a domain.

.env
NOTIX_API_KEY=notix_xxxxxxxxxxxx
NOTIX_WEBHOOK_SECRET=whsec_xxxxxxxxxxxx
FAQ

Questions, answered.

What are the SMTP settings?
Host smtp.usenotix.dev, port 465 for implicit TLS or 587 for STARTTLS, username notix, and your Notix API key as the password. The from address must be on a domain you have verified in Notix.
Does the relay treat magic links differently from the API?
No. Mail through the relay goes through the same pipeline as the API: the same suppression list, tracking and webhooks.
Why is my send refused with a from-address error?
The from address must be on a domain you have verified in Notix. Add the domain in the console, publish the DNS records it shows, and wait for verification; until then, sends from that domain are refused.

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Related
Guides

Send email from Next.js

A route handler, a server action and a contact form on the App Router, with a React Email template.

Docs

SMTP

Send through the Notix SMTP relay from any app or framework that speaks SMTP.

Integrations

Integrations

Notix inside the frameworks, platforms and AI coding tools you already use, from Next.js and Laravel to Supabase, Vercel and Cursor.

Product

Email API

One JSON API for transactional and marketing email: send, batch, schedule, webhooks, typed SDKs.

Notix

Pricing

A free plan with no card, and Pro at $15 a month for 50,000 emails. Only sent volume is metered.

Send your first email in five minutes.

Verify a domain, copy an API key, make one call. The free plan does not ask for a card.

Start free, no cardRead the docs