jorgemonterde / demo-nodemailer-gmail Goto Github PK

npm init -y
touch index.js .env .gitignore
npm i express nodemailer
mkdir utils
touch utils/nodemailer.js

Add rules to gitignore

add start script

"scripts": {
    "start": "node index.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },

.env

GMAIL_SENDER=
GMAIL_CLIENT_ID=
GMAIL_CLIENT_SECRET=
ACCESS_TOKEN=
REFRESH_TOKEN=

go to GCP console

create new project -> demo-nodemailer-gmail

API & Services -> OAuth consent screen
select External

click Create

Enter App name support email

add https://mail.google.com/ manually, update

save and continue

Add user (i.e. )

on GCP console go to

1. Credentials -> Create credentials -> OAuth Client ID

2. select web application

3. JS authorised origins -> http://127.0.0.1:5000

4. Authorized redirect URIs -> https://developers.google.com/oauthplayground

5. Click create

1. go to https://developers.google.com/oauthplayground

2. go to the gear icon on the upper right check use your own OAuth credentials type in your app Client ID and Client Secret, and close this menu.

3. Look for Gmail API v1, click on the toggle and check at least the first ("https://mail.google.com")

4. Click Authorize API

5. Click Exchange Authorization code for tokens

6. Save yor Refresh and Access tokens in your .env

in utils/nodemailer.js

"use strict";
const nodemailer = require("nodemailer");

let transporter = nodemailer.createTransport({
    host: "smtp.gmail.com",
    port: 465,
    secure: true,
    auth: {
        type: "OAuth2",
        clientId: process.env.GMAIL_CLIENT_ID,
        clientSecret: process.env.GMAIL_CLIENT_SECRET
    }
});

module.exports = transporter;

use the sendMail method of the transporter to send an email specifying auth credentials.

transporter.sendMail({
        from: process.env.GMAIL_SENDER,
        to: emailrecipient,
        subject: "Nodemailer from gmail",
        text: "I hope this message gets through!",
        auth: {
            user: process.env.GMAIL_SENDER,//gmail address
            refreshToken: process.env.REFRESH_TOKEN,
            accessToken: process.env.ACCESS_TOKEN,
            expires: 1484314697598,
        },
    });

run your app with npm start and visit your endpoint.

Thanks to Alex: How to send emails using NodeMailer, gmail and OAuth2