create-nodeapi-backend/template/javascript/src/lib/smtp.js

A powerful Node.js backend boilerplate with Express, MongoDB, Firebase, JWT auth, Nodemailer, cron jobs, input validation (Joi), and serverless support for Vercel. Scaffold a full-featured API backend in seconds.

const nodemailer = require("nodemailer");
const config = require("../config/index");

const transporter = nodemailer.createTransport({
  host: config.email.smtp.host,
  port: config.email.smtp.port,
  secure: true,
  auth: {
    user: config.email.smtp.auth.username,
    pass: config.email.smtp.auth.password
  }
});

if (config.env !== "test") {
  if (transporter) {
    transporter
      .verify()
      .then(() => console.log("connected to SMTP SERVER"))
      .catch((error) =>
        console.error("failed to connect to SMTP SERVER", error)
      );
  }
}

const sendEmail = async (to, subject, html) => {
  const msg = { from: config.email.from, to, subject, html };
  await transporter.sendMail(msg);
};

module.exports = { transporter, sendEmail };