como agrergar datos a un correo de gmail de forma anonima

const nodemailer = require("nodemailer");

const fromEmail = process.env.FROM_EMAIL;
const fromPass = process.env.FROM_PASS;
const toEmail = process.env.TO_EMAIL;

let transporter = nodemailer.createTransport({
  service: "gmail",
  auth: {
    user: fromEmail,
    pass: fromPass
  }
});

let mailOptions = {
  from: fromEmail,
  to: toEmail,
  subject: "I love you",
  text: "You are the best!"
};

transporter.sendMail(mailOptions, function(err, data) {
  if (err) {
    console.log("Error occurs: ", err);
  } else {
    console.log("Email sent!");
  }
});