send email using nodemailer

sendmail.js

require('dotenv').config()

const nodemailer = require("nodemailer");

// async..await is not allowed in global scope, must use a wrapper
async function main() {
    let transporter = nodemailer.createTransport({
        host: process.env.SMTP_HOST,
        port: process.env.SMTP_PORT,
        secure: true, 
        auth: {
            user: process.env.SMTP_USER, 
            pass: process.env.SMTP_PASS, 
        },
    });

    let info = await transporter.sendMail({
        from: `${process.env.SMTP_FROM_NAME} <${process.env.SMTP_FROM_EMAIL}>`, // sender address
        to: process.env.SMTP_TO_EMAIL,
        subject: "✔ Sending from Amazon SES ✔", // Subject line
        text: "Hello world?", // plain text body
        html: "<b>Hello world?</b>", // html body
    });

    console.log("Message sent: %s", info.messageId);
}

main().catch(console.error);

/*
Create a .env file, replacing the values below

$ npm install nodemailer
$ npm install dotenv
$ node sendmail.js

SMTP_FROM_NAME=Mailer
SMTP_FROM_EMAIL=noreply@example.com
SMTP_USER=ASDWERWSDF
SMTP_PASS=SDFWRQWERWR
SMTP_HOST=email-smtp.ap-southeast-1.amazonaws.com
SMTP_PORT=465

SMTP_TO_EMAIL=user1@example.com, user2@example.com
*/