Send Email Through SMTP (SSL) Using Zend

email.php

<?php

use Zend\Mail\Transport\Smtp as SmtpTransport;
use Zend\Mail\Transport\SmtpOptions;
use Zend\Mail\Message;

public function sendEmail($to, $subject, $body){
    $message = new Message();
    $message->addTo($to)
        ->addFrom('helpdesk@example.com')
        ->setSubject($subject)
        ->setBody($body);

    // Setup SMTP transport using PLAIN authentication over TLS
    $transport = new SmtpTransport();
    $options   = new SmtpOptions(array(
        'name'              => 'example.com',
        'host'              => 'smtp.example.com',
        'port'              => 465,
        'connection_class'  => 'login',
        'connection_config' => array(
            'username' => 'helpdesk@example.com',
            'password' => 'password',
            'ssl'      => 'ssl',
        ),
    ));

    $transport->setOptions($options);

    $transport->send($message);
}

?>