Lambda function to send emails using node mailer

index.js

require('dotenv').config()
var nodemailer = require('nodemailer');


const {EMAIL_SERVICE, EMAIL, EMAIL_PASSWORD, PORT} = process.env;

var transporter = nodemailer.createTransport({
  service: EMAIL_SERVICE,
  auth: {
    user: EMAIL,
    pass: EMAIL_PASSWORD
  }
});

exports.handler = (event) => {
  return new Promise((resolve, reject)=>{
    var mailOptions = {from: EMAIL, ...event};
    console.log('Sending confirmation email to:', event.to);
    transporter.sendMail(mailOptions, function(error, info){
      if (error) {
        reject(error);
      } else {      
        resolve({status: 'OK'});
      }
    });
  });
};