NodeJS Send Email using SendGrid

NodeJS Send Email using SendGrid

var Promise = require('bluebird'),
 nodemailer = Promise.promisifyAll(require('nodemailer')),
 sendGridTransport = require('nodemailer-sendgrid-transport');
 
 var options = {
  auth: {
    api_user: process.env.SENDGRID_USERNAME,
    api_key: process.env.SENDGRID_PASSWORD
  }
}

var transport = Promise.promisifyAll(nodemailer.createTransport(sendGridTransport(options)));

function SendReport() {

 var mailOptions = {
     from: FROM, // sender address
     to: TO, // list of receivers
     subject: subject, // Email subject line,
     html: BODY, // Email body
     attachments: [
       {
         filename: fileName + '.csv',
         content: res,
         contentType: 'text/csv'
       }
     ]
   };

   return transport.sendMailAsync(mailOptions);
}