Nodemail usage for TrinteJS framework

mailer.js

/**
 *  Mail manager
 *  
 *
 *  Created by init script
 *  App based on TrinteJS MVC framework
 *  TrinteJS homepage http://www.trintejs.com
 **/
var nodemailer = require("nodemailer");
var config = require("../configuration");
var mailConf = config.mailer[process.env.NODE_ENV];


// Message object
var defaultMessage = {
    // sender info
    from: 'Sender Name <sender@example.com>',
    // Comma separated list of recipients
    to: '"Receiver Name" <nodemailer@example.com>',
    // Subject of the message
    subject: 'TrinteJS is unicode friendly',
    headers: {
        'X-Laziness-level': 1000
    },
    // plaintext body
    text: '',
    // HTML body
    html: '',
    // An array of attachments
    attachments: []
};

exports.createTransport = function createTransport(transport, mailConfig) {
    transport = transport ? transport : mailConf.transport;
    mailConfig = mailConfig ? mailConfig : mailConf.config;
    // Create a transport object
    return nodemailer.createTransport(transport, mailConfig);
};

exports.sendMail = function sendMail(message, callback, transport) {
    var close = transport ? false : true;
    transport = transport ? transport : exports.createTransport();
    transport.sendMail(message, function(error) {
        if (error) {
            console.log(error.message);
            return callback && callback(error.message);
        }
        if (close) {
            transport.close();
        }
        return callback && callback(null);
    });
};

exports.mailSender = function mailSender() {
    return function(req, res, next) {
        var recMessage = req.body.message, message;
        if (recMessage) {
            message = MergeRecursive({}, defaultMessage);
            message = MergeRecursive(message, recMessage);
            // Create a transport object
            var locTransport = nodemailer.createTransport(mailConf.transport, mailConf.config);
            locTransport.sendMail(message, function(error) {
                if (error) {
                    console.log('Error occured');
                    console.log(error.message);
                    return res.send(error);
                }
                console.log('Message sent successfully!');
                // close the connection pool
                locTransport.close();
                // if you don't want to use this transport object anymore, uncomment following line
                return res.send('Message sent successfully!');
            });
        } else {
            return res.send('Invalid message!');
        }
    };
};