How to send email in Node.js with Nodemailer

#node #npm #javascript #tutorial

Hello guy's, In this article we will learn how to send email in Node.js.The main advantage of this is that we does not need an API.
We just need a npm package called Nodemailer. let's start coding.

Now create new folder node-mail and open terminal in that directory and write a command

npm init

Hit the enter to given questions.Now install the packages that we need.

npm install dotenv nodemailer

The Nodemailer is used to send mail and Dotenv is a zero-dependency module that loads environment variables from a .env file into process.env.

Now create a new file named index.js and require the packages

require('dotenv').config();
const mailer = require("nodemailer");

In index.js create new variable object called body and write some lines of code

let body ={
    from: 'your mail-id',
    to: 'recipient mail-id',
    subject: 'This is subject',
    html: '<h2>The html content</h2><br>',
}

Now create transporter object that holds service and auth

const transporter =   mailer.createTransport({
    service: 'gmail',
    auth:{
        user: process.env.EMAIL_USER,
        pass : process.env.EMAIL_PASS
    }
})

EMAIL_USER = your gmail-id
EMAIL_PASS = password

After creating transporter object we can verify our transporter configuration with verify(callback).

// verify connection configuration
transporter.verify(function(error, success) {
  if (error) {
    console.log(error);
  } else {
    console.log("Server is ready to take our messages");
  }
});

you just thinking about process.env. Create new file named .env and put some lines of code given below

So do the last changes index.js send mail with defined transport object

transporter.sendMail(body,(err, result) =>{
    if (err) {
        console.log(err);
        return false
    }
    console.log(result);
    console.log("email sent");
})

Full index.js code

require('dotenv').config();
const mailer = require("nodemailer");
let body ={
    from: 'your mail-id',
    to: 'recipient mail-id',
    subject: 'This is subject',
    html: '<h2>The html content</h2><br>',
}

const transporter =   mailer.createTransport({
    service: 'gmail',
    auth:{
        user: process.env.EMAIL_USER,
        pass : process.env.EMAIL_PASS
    }
})

transporter.verify(function(error, success) {
  if (error) {
    console.log(error);
  } else {
    console.log("Server is ready to take our messages");
  }
});

transporter.sendMail(body,(err, result) =>{
    if (err) {
        console.log(err);
        return false
    }
    console.log(result);
    console.log("email sent");
})

Now we are ready to send code but we have left with one little task.We have to enable the setting on this LINK.Without updating this we cannot send mail.

Now it's time to send email to the recipient. Open the terminal and write command

node index.js

I hope it will works successfully.Let me know if you encounter any errors.

Top comments (6)

Alex Janke • Sep 2 '20

Highly recommended to also verify your transporter. This tests your connection and authentication before actually sending mails.

// verify connection configuration
transporter.verify(function(error, success) {
  if (error) {
    console.log(error);
  } else {
    console.log("Server is ready to take our messages");
  }
});