Here’s how to send an email using nodemailer.

First install it:

npm install nodemailer

Then import it in your Node script or app:

import nodemailer from 'nodemailer'

Initialize a transporter object that we’ll use later to send the email:

const transporter = nodemailer.createTransport({
  host: 'smtp.yoursmtpserver.com',
  port: 465,
  secure: true,
  auth: {
    user: 'smtp_user',
    pass: 'smtp_pass',
  },
})

⚠️ NOTE: you need to fill those values with real SMTP server credentials

Now create an options object with the details of the email you want to send:

const options = {
  from: 'flavio@blabla.com',
  to: 'flavio@yo.com',
  subject: 'Hi!',
  html: `<p>Hello</p>`,
}

Finally call the sendMail() method on the transporter object you created previously, passing options and a callback that will be executed when it’s finished:

transporter.sendMail(options, (err, info) => {
  if (err) {
    console.log(err)
  } else {
    console.log('EMAIL SENT')
  }
})

This also accepts a promise-based syntax:

const info = await transporter.sendMail(options)

Full code:

import nodemailer from 'nodemailer'

const sendEmail = () => {
  const transporter = nodemailer.createTransport({
    host: 'smtp.yoursmtpserver.com',
    port: 465,
    secure: true,
    auth: {
      user: 'smtp_user',
      pass: 'smtp_pass',
    },
  })

  const options = {
    from: 'flavio@blabla.com',
    to: 'flavio@yo.com',
    subject: 'Hi!',
    html: `<p>Hello</p>`,
  }

	transporter.sendMail(options, (err, info) => {
    if (err) {
      console.log(err)
    } else {
      console.log('EMAIL SENT')
    }
  })
}

Lessons in this unit:

0:	Introduction
1:	Axios crashes the Node.js process when the request fails
2:	How to set up a cron job that runs a Node.js app
3:	How to get both parsed body and raw body in Express
4:	Interact with the Google Analytics API using Node.js
5:	How to bulk convert file names using Node.js
6:	How to deep copy JavaScript objects using structuredClone
7:	How to handle file uploads in Node.js
8:	▶︎ How to send an email using nodemailer
9:	Logging all the requests coming through an Express app
10:	How to upload an image to S3 using Node.js
11:	How to read a CSV file with Node.js
12:	How to set the current working directory of a Node.js program
13:	How to upload files to S3 from Node.js
14:	How to write a CSV file with Node.js
15:	Where to host a Node.js app
16:	Parsing JSON with Node.js
17:	nodemailer, how to embed an image into an email
18:	The Pug Guide
19:	Restarting a Node process without file changes
20:	How to use Sequelize to interact with PostgreSQL