// Client
var nodemailer = require('nodemailer');

// config
var smtpConfig = {
    host: 'localhost',
    port: 4650,
    secure: false, // dont use SSL
    auth: {
        user: 'user@gmail.com',
        pass: 'pass'
    },
    tls: {rejectUnauthorized: false}
};

// create reusable transporter object using the default SMTP transport
var transporter = nodemailer.createTransport(smtpConfig);

// setup e-mail data with unicode symbols
var mailOptions = {
    from: '"Fred Foo 👥" <foo@blurdybloop.com>', // sender address
    to: 'bar@blurdybloop.com, baz@blurdybloop.com', // list of receivers
    subject: 'Hello ✔', // Subject line
    text: 'Hello world 🐴', // plaintext body
    html: '<b>Hello world 🐴</b>' // html body
};

// send mail with defined transport object
transporter.sendMail(mailOptions, function(error, info){
    if(error){
        return console.log(error);
    }
    console.log('Message sent: ' + info.response);
});

// Server
var SMTPServer = require('smtp-server').SMTPServer;

var server = new SMTPServer({
    onAuth: function(auth, session, callback){
    	console.log(auth);
        if(auth.username !== 'abc' || auth.password !== 'def'){
            return callback(new Error('Invalid username or password'));
        }
        callback(null, {user: 123}); // where 123 is the user id or similar property
    },
    onConnect: function(session, callback){
        if(session.remoteAddress === '127.0.0.1'){
            return callback(new Error('No connections from localhost allowed'));
        }
        return callback(); // Accept the connection
    },
    onData: function(stream, session, callback){
        stream.pipe(process.stdout); // print message to console
        stream.on('end', callback);
    }
});

server.listen(4650, function() {
	console.log('SMTP Server listening on port ' + 4650);
});