This is a mail sender node application which uses the nodeMailer node module. You need to turn on 3rd party permission for your google account through which you will be sending mail.
To turn on the permission go here
Find this block of code and read the comments to personalize.
var transporter = nodemailer.createTransport({
service: 'gmail',
auth: {
user: 'beingsemicolons@gmail.com', //Set your sender email address. make sure in this id the google persmissions are enabled.
pass: '********', //Give your original mail id password for authentication
},
});