test-email.js

const nodemailer = require("nodemailer");
require("dotenv").config();

async function SendTestEmail() {
  var mailConfig;

  if (process.env.NODE_ENV === "production") {
    // all emails are delivered to destination
    mailConfig = {
      host: process.env.SMTP_HOST,
      port: process.env.SMTP_PORT,
      auth: {
        user: process.env.SMTP_EMAIL,
        pass: process.env.SMTP_PASSWORD,
      },
    };

    var transporter = nodemailer.createTransport(mailConfig);

    transporter
      .sendMail({
        from: process.env.SMTP_EMAIL, // sender address
        to: "lgorman@turing.ac.uk", // list of receivers
        subject: "Hello ✔", // Subject line
        text: "Hello world?", // plain text body
        html: "<b>Hello world?</b>", // html body
      })
      .then((info) => {
        console.log("Email sent callback");
      });
    console.log(mailConfig);
  } else {
    // all emails are catched by ethereal.email
    let testAccount = await nodemailer.createTestAccount();

    mailConfig = {
      host: process.env.SMTP_HOST,
      port: process.env.SMTP_PORT,
      auth: {
        user: testAccount.user, // generated ethereal user
        pass: testAccount.pass,
      },
    };
    console.log(mailConfig);

    var transporter = nodemailer.createTransport(mailConfig);

    transporter
      .sendMail({
        from: '"Fred Foo 👻" <foo@example.com>', // sender address
        to: "bar@example.com, baz@example.com", // list of receivers
        subject: "Hello ✔", // Subject line
        text: "Hello world?", // plain text body
        html: "<b>Hello world?</b>", // html body
      })
      .then((info) => {
        console.log("Preview URL: " + nodemailer.getTestMessageUrl(info));
      });
    console.log(mailConfig);
  }
}


const start = async function(){
    await SendTestEmail()

}

start()