npm install nodemailer
npm install -D @types/nodemailer

import nodemailer from "nodemailer";

const transporter = nodemailer.createTransport({
  host: "smtp.mailofly.com",
  port: 587,
  secure: false, // true for 465, false for other ports
  auth: {
    user: "mailofly",
    pass: process.env.MAILOFLY_API_KEY, // e.g. mfly_live_...
  },
});

async function main() {
  const info = await transporter.sendMail({
    from: '"Acme" <alerts@yourcompany.com>',
    to: "alex@example.com",
    subject: "Hello via Nodemailer & Mailofly",
    text: "Plaintext fallback message",
    html: "<b>Hello from Mailofly SMTP!</b>",
  });

  console.log("Message sent: %s", info.messageId);
}

main().catch(console.error);