CakePHP CakeEmail Could not send email - php

Question

I have looked through almost all existing threads, but I still can't find the problem, so I decided post a new one.
I have code that is running on my live server and the email function is working perfectly fine. It was setup by a contractor and he left no documentation on how to setup CakePHP.
I need to setup my staging server to work exactly the same as the live server. I think I have everything working, except for the email functions. Since I am running exactly the same code on both servers, I am positive that I have missed installing something or setting up configuration on my staging server.
So, what is the framework/module/library needed for CakeEmail? What is the configuration needed for it?
I am running at CakePHP 2.3.4
Here's my code snippet:
App::uses('CakeEmail', 'Network/Email');
$emailTest = new CakeEmail('default');
$emailTest->to('MyEmail#gmail.com');
$emailTest->from(array('me#example.com' => 'My Site'));
$emailTest->subject('About');
try {
$emailTest->send('Hey');
}
catch (SocketException $e) {
echo("Exception: " . $e->getMessage() . "\r\n");
echo("File: " . $e->getFile() . "\r\n");
echo("Line: " . $e->getLine() . "\r\n");
echo("Trace: " . $e->getTraceAsString() . "\r\n");
}
In email.php:
public $default = array(
'transport' => 'Mail',
'from' => 'notification#MySite.com',
// 'charset' => 'utf-8',
// 'headerCharset' => 'utf-8',
);
And I am getting this stack trace:
Exception: Could not send email.
File: /var/www/MySite/lib/Cake/Network/Email/MailTransport.php
Line: 70
Trace: 0 /var/www/MySite/lib/Cake/Network/Email/MailTransport.php(47): MailTransport->_mail('staging#gmail.c...', 'hsbsv vdbeh lik...', 'hsbsv vdbeh lik...', 'From: MySite...', NULL)
1 /var/www/MySite/lib/Cake/Network/Email/CakeEmail.php(1071): MailTransport->send(Object(CakeEmail))
2 /var/www/MySite/app/Model/Notification.php(238): CakeEmail->send('hsbsv vdbeh lik...')
3 [internal function]: Notification->afterSave(true, Array)
4 /var/www/MySite/lib/Cake/Event/CakeEventManager.php(246): call_user_func_array(Array, Array)
5 /var/www/MySite/lib/Cake/Model/Model.php(1772): CakeEventManager->dispatch(Object(CakeEvent))
6 /var/www/MySite/app/Controller/CommentsController.php(160): Model->save(Array)
7 [internal function]: CommentsController->add()
8 /var/www/MySite/lib/Cake/Controller/Controller.php(486): ReflectionMethod->invokeArgs(Object(CommentsController), Array)
9 /var/www/MySite/lib/Cake/Routing/Dispatcher.php(187): Controller->invokeAction(Object(CakeRequest))
10 /var/www/MySite/lib/Cake/Routing/Dispatcher.php(162): Dispatcher->_invoke(Object(CommentsController), Object(CakeRequest), Object(CakeResponse))
11 /var/www/MySite/app/webroot/index.php(109): Dispatcher->dispatch(Object(CakeRequest), Object(CakeResponse))
12 {main}