cakephp2 how to send email using gmail smtp dynamically to a closed mailing list - email

Question

Is there anyway in php or cakephp, to send email using smtp so that I can send email to a closed/internal mailing list. e.g:
In my company we have an email list: appsteam#company.com, which can only be send if a person also using xxx#company.com email. outside from that email it will be blocked. so in cakephp is there anyway to somehow take the user credential and send email under a company or maybe in gmail email, if it's google group
I think what I actually want will be, how to set up cakephp email so that it send just like I send directly from the email server, if I use gmail, then I want it looks like gmail (header, etc)
what the final code will do is supposedly, I will take credential from users for their email, and send the mail using that. here is my code for AbcComponent.php
/*
* Abc components
*/
class AbcComponent extends Component {
public $options = array();
/**
* Constructor
**/
public function __construct(ComponentCollection $collection, $options = array()){
parent::__construct($collection,$options);
$this->options = array_merge($this->options, $options);
}
public function send_link ($user_email = null, $recipients = null, $subject = null, $message = null, $group_id = null, $user_id = null, $email_id = null, $download_password = null) {
$final_subject = $subject;
$final_recipients = $recipients;
$final_message = $message;
App::uses('CakeEmail', 'Network/Email');
$recipients = str_replace(' ', '', $recipients);
$recipients = explode(',', $recipients);
$recipient_queue_num = 1;
//Send the email one by one
foreach ($recipients as $recipient) :
$email = new CakeEmail();
$email->delivery = 'smtp';
//$email->from($user_email);
$email->from('xxxxx#gmail.com');
$email->to($recipient);
$email->smtpOptions = array(
'port'=>'465',
'timeout'=>'30',
'host' => 'ssl://smtp.gmail.com',
'username'=>'xxxxx#gmail.com', //this will be later grab from dbase based on user
'password'=>'password',
);
$email->subject($final_subject);
$email->template('download_link_email');
$email->emailFormat('both');
$email->viewVars(array('final_message' => $final_message));
if($email->send()) {
debug('email is sent');
} else {
debug('email is not sent');
}
//queue number increase for hashing purpose
$recipient_queue_num++;
endforeach;
}

Answer 1

$this->Email->delivery = ...
and later
$email = new CakeEmail();
Where is your "new object" statement before trying to access it?
You cannot just use it without.
You are also using both $this->Email and $email. This is probably your mistake (copy and paste errors).
$this->Email = new CakeEmail();
$this->Email->delivery = ...
...
"Indirect modification of overloaded property" is usually always an indicator of a non declared object that you are trying to access.