Send Email using G-Mail SMTP in Express/Node.js

In this arti­cle, I will demon­strate a sim­ple exam­ple of send­ing emails using G-Mail SMTP in Express/ Node.js. fortunately sending emails in express/node js pretty easy, in node.js there are many open source email libraries are available.

In this tutorial we are going to use express-mail library. For sending html emails we are going to use template engine called pugjs, this project was formerly known as Jade.

Create package.json file and keep it in any folder. Put the below code in it.

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{
  "name": "sending-emails-with-express-mailer-gmail-smtp",
  "version": "1.0.0",
  "description": "",
  "main": "server.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [
    "express",
    "mailer"
  ],
  "author": "arjunphp.com",
  "license": "ISC",
  "dependencies": {
    "express": "^4.14.0",
    "pug": "^2.0.0-beta6",
    "express-mailer": "^0.3.1"
  }
}

or

issue npm init command to generate package.json and after generating, issue following commands to install express js, pugjs and express mailer dependencies, npm install --save pug express express-mailer

server.js

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// call the packages we need
const express = require('express');  // call express
const mailer = require('express-mailer'); // call express
const app = express(); // create a server
 
const port = process.env.PORT || 8000;  // set our port
 
// set the view folder to views
app.set('views', __dirname + '/views');
// set the view engine to pug
app.set('view engine', 'pug');
 
// Configure express-mail and setup default mail data.
mailer.extend(app, {
  from: '[email protected]',
  host: 'smtp.gmail.com', // hostname
  secureConnection: true, // use SSL
  port: 465, // port for secure SMTP
  transportMethod: 'SMTP', // default is SMTP. Accepts anything that nodemailer accepts
  auth: {
  user: '[email protected]', // gmail id
  pass: 'yourPassword' // gmail password
  }
});
 
 
// test route to trigger emails
app.get('/', function (req, res) {
  // Setup email data.
  var mailOptions = {
    to: '[email protected]',
    subject: 'Email from SMTP sever',
    user: {  // data to view template, you can access as - user.name
      name: 'Arjun PHP',
      message: 'Welcome to arjunphp.com'
    }
  }
 
  // Send email.
  app.mailer.send('email', mailOptions, function (err, message) {
    if (err) {
      console.log(err);
      res.send('There was an error sending the email');
      return;
    }
    return res.send('Email has been sent!');
  });
 
});
 
app.listen(port, function () {
  console.log(`Example app listening on port ${port}!`);
});

views/email.pug

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doctype html
head
body
  div
   p
    b Hi #{user.name}
  div
    p #{user.message}

Run the app with the following command:

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$ node app.js

Then, load http://localhost:8000/ in a browser to see the output.

I hope you like this Post, Please feel free to comment below, your suggestion and problems if you face - we are here to solve your problems.