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How to Send Email in Node.js

Assuming you have basic setup of node.js server, if not please go through this tutorial.

Using fake SMTP provider

To send emails, we need an SMTP server. We will use a nice service called that makes our email testing way easier. is a fake SMTP provider, which send all emails (irrespective of to whom it is sent) into single inbox. So, while developing we don’t have to check emails by logging in to the actual email clients. This becomes handy when many emails or users involved in email sending feature.

To get the fake SMTP configuration, you can login to and Create Inbox . If you will open inbox it will show you the SMTP config(as shown below). We should use them to send all emails to this particular inbox.

Mailtrap fake SMTP Setting

Sending Email

We will be using a package called nodemailer to send the email. Please install the same using npm install nodemailer --save or yarn add nodemailer

We can configure it in our index.js file as below:

  • Import the nodemailer package in index.js as below
const nodemailer = require("nodemailer");
  • Create a new endpoint called /send-email
app.get("/send-email", async (request, response) => {
  try {
    //email sending code will go here
  } catch (e) {
    response.send(`An error occurred while sending email`);

Note: The callback function is async because we will await for the sendEmail function(code in upcoming point)

  • Create transport object that holds the SMTP configuration (copied fom
let transporter = nodemailer.createTransport({
  host: "",
  port: 2525,
  auth: {
    user: "30b7d33f3ac774",
    pass: "d75252e55f53d9"

Note: Make sure to update these SMTP settings with your actual SMTP providers like Mailgun, SendGrid or MailJet when you move your code to production

  • Create email data and send the email
const emailData = {
  from: "",
  to: "",
  subject: "A test email",
  html: "<p> Hi there, this is a test email </p>"

// send mail with defined transport object
let info = await transporter.sendMail({
  from: emailData.from,
  subject: emailData.subject,
  html: emailData.html

response.send(`An email successfully sent to ${}`);
  • You can try with any to address, it will send the email to the same mailtrap inbox, as shown below:

Mailtrap inbox

The Sandbox

Extract the email sending code to a separate file for reusability (Optional)

Create a new file called sendEmail.service.js

  • Create an async function in it called sendEmail
  • Move email sending specific code in the sendEmail function
  • Export as module using module.exports = sendEmail; at the end

Then in index.js

  • Import the sendEmail function at the top
const sendEmail = require("./sendEmail.service");
  • And call it from /send-email route as below
const info = await sendEmail(emailData);

The codesandbox with separate email service