send_email.js

const nodemailer = require('nodemailer');

nodemailer.createTestAccount((err, account) => {
    if (err) {
        console.error('Failed to create a testing account. ' + err.message);
        return process.exit(1);
    }

    console.log('Credentials obtained, sending message...');

    let transporter = nodemailer.createTransport({
        host: account.smtp.host,
        port: account.smtp.port,
        secure: account.smtp.secure,
        disableFileAccess: true,
        disableUrlAccess: true,
        
        auth: {
            user: account.user,
            pass: account.pass
        }
    });

    let message = {
        from: 'Sender Name <sender@example.com>',
        to: 'Recipient <recipient@example.com>',
        subject: 'Nodemailer is unicode friendly ✔',
        text: 'Hello to myself!',
        html: '<p><b>Hello</b> to myself!</p>'
    };

    transporter.sendMail(message, (err, info) => {
        if (err) {
            console.log('Error occurred. ' + err.message);
            return process.exit(1);
        }

        console.log(`Message sent: ${info.messageId}`);
        console.log(`Preview URL: %s ${nodemailer.getTestMessageUrl(info)}`);
    });
});