//npm i nodemailer --save

var nodemailer = require('nodemailer');

function sendEmail(subject, emailBody, email){
    let myEmail = 'myEmailAddress';

    let transporter = nodemailer.createTransport({
        service: 'Hotmail', //Gmail, Hotmail
        auth: {
            user: myEmail,
            pass: 'suaSenha'
        }
    });

    let mailOptions = {
        from: myEmail,
        to: email, // list of receivers
        subject: subject,
        text: emailBody //Corpo do email,html ``
    };

    transporter.sendMail(mailOptions, function(error, info){
        if(error){
            console.log(error);
        else
            console.log('Email sent: ' + info.response);
    });
}

module.exports.sendEmail = sendEmail;

//Exemplo de uso
var Mailer = require('./mailer');
Mailer.sendEmail('subject', 'email body', 'email');