How to send Attachments and Email using nodemailer in Node.js ?

Last Updated : 10 Feb, 2021

For this purpose, we will use a package called nodemailer. It is a module that makes email sending pretty easy. For using it, you will need to install by using the following command:

$ npm install nodemailer

Features of nodemailer module:

It has zero dependencies and heavy security.
You can use it hassle free whether its Azure or Windows box.
It also comes with Custom Plugin support for manipulating messages.

Inorder to send email, create a file named index.js and write down the following code:
Filename: index.js

javascript

var nodemailer = require("nodemailer");
 
var sender = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    user: 'username@gmail.com',
    pass: 'your_password'
  }
});
 
var mail = {
  from: "username@gmail.com",
  to: "receiver's_username@gmail.com",
  subject: "Sending Email using Node.js",
  text: "That was easy!"
};
 
sender.sendMail(mail, function(error, info) {
  if (error) {
    console.log(error);
  } else {
    console.log("Email sent successfully: "
                 + info.response);
  }
}); 

Steps to run this program: In order to run this file, just Git Bash into your working directory and type the following command:

$ nodemon index.js

If you don’t have nodemon installed then just run the following command:

$ node index.js

To double-check its working you can go to the receiver’s mail and you will get the following mail as shown below:

What if you have multiple receiver?
Well in that case just add below code in your mail function:

to: 'first_username@gmail.com, second_username@gmail.com'

What if you want to send HTML formatted text to the receiver?
Well in that case just add below code in your mail function:

html: "<h1>GeeksforGeeks</h1><p>I love geeksforgeeks</p>"

What if you want to send an attachment to the receiver?
Well in that case just add below code in your mail function:

attachments: [
    {
      filename: 'mailtrap.png',
      path: __dirname + '/mailtrap.png',
      cid: 'uniq-mailtrap.png' 
    }
  ]

The final index.js file look like this:
Filename: index.js

javascript

var nodemailer = require("nodemailer");
 
var sender = nodemailer.createTransport({
    service: 'gmail',
    auth: {
        user: 'username@gmail.com',
        pass: 'your_password'
    }
});
 
var mail = {
    from: 'username@gmail.com',
    to: 
'first_username@gmail.com, second_username@gmail.com',
    subject: 'Sending Email using Node.js',
    text: 'That was easy!',
  html: 
"<h1>GeeksforGeeks</h1> 
<p>I love geeksforgeeks</p>
",
  attachments: [
        {
            filename: 'mailtrap.png',
            path: __dirname + '/mailtrap.png',
            cid: 'uniq-mailtrap.png'
        }
    ]
};
 
sender.sendMail(mail, function (error, info) {
    if (error) {
        console.log(error);
    } else {
        console.log('Email sent successfully: '
                + info.response);
    }
});

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