Uses nodemailer-mailgun-transport and nodemailer to send emails through mailgun's SMTP tools.

mail.js

/**
 * mail.js
 * 2023-03-24
 * Timothy Phillips
 */

const nodemailer = require("nodemailer");
const mg = require("nodemailer-mailgun-transport");
const MAILGUN_USERNAME = process.env.MAILGUN_USERNAME;
const domain = process.env.MAILGUN_DOMAIN;
const mailGunApiKey = process.env.MAILGUN_API_KEY;
const postmasterAddress = process.env.POSTMASTER_ADDRESS;

const auth = {
	auth: {
		api_key: mailGunApiKey,
		domain,
		secure: true,
	},
};

const sendEmail = async (recipients, subject, data) => {
	// Create email transporter.
	const transport = nodemailer.createTransport(mg(auth));

	transport.sendMail(
		{
			from: MAILGUN_USERNAME,
			to: recipients,
			subject: subject,
			html: data,
		},
		(err, i) => {
			if (err) {
				console.error(err);
			} else {
				console.log(`Sent an email ("${subject}") to: ${recipients}.`);
			}
		}
	);
};

module.exports = {
	sendEmail,
};