Nodemailer Gmail Authentication FIXED! (How to Get an App Password) | Node.js Tutorial

Tired of seeing "Authentication failed" errors when trying to send emails from your Node.js app with Nodemailer and Gmail? This tutorial is your ultimate fix.

In this step-by-step guide for beginners, we break down exactly how to configure your Gmail account to work securely with Nodemailer. The old "Less secure app access" method is gone, so we show you the new, correct way using a generated App Password. No more confusing errors—just a working email setup for your project.

What You'll Learn:

Why your Nodemailer code keeps failing with Gmail.

How to enable 2-Step Verification on your Gmail account (required).

The exact steps to generate a unique App Password for Nodemailer.

How to write clean Node.js code to send an email successfully.

Crucial security tips to protect your Gmail account.

Follow along and get your Node.js application sending emails in less than 10 minutes. This is a free and secure setup that actually works in 2024.

Video Chapters / Timestamps:
0:00 - The Gmail + Nodemailer Problem
1:15 - Enabling 2-Factor Authentication in Gmail
2:40 - Generating the App Password (The Key Step!)
4:00 - Writing the Node.js Code with Nodemailer
5:30 - Testing & Sending a Real Email
6:45 - Security Best Practices & Using .env Files
7:30 - Troubleshooting Common Errors

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