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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Mail
  * @subpackage Transport
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 
 /**
  * @see Zend_Mime
  */
 // require_once 'Zend/Mime.php';
 
 /**
  * @see Zend_Mail_Protocol_Smtp
  */
 // require_once 'Zend/Mail/Protocol/Smtp.php';
 
 /**
  * @see Zend_Mail_Transport_Abstract
  */
 // require_once 'Zend/Mail/Transport/Abstract.php';
 
 
 /**
  * SMTP connection object
  *
  * Loads an instance of Zend_Mail_Protocol_Smtp and forwards smtp transactions
  *
  * @category   Zend
  * @package    Zend_Mail
  * @subpackage Transport
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Mail_Transport_Smtp extends Zend_Mail_Transport_Abstract
 {
     /**
      * EOL character string used by transport
      * @var string
      * @access public
      */
     public $EOL = "\n";
 
     /**
      * Remote smtp hostname or i.p.
      *
      * @var string
      */
     protected $_host;
 
 
     /**
      * Port number
      *
      * @var integer|null
      */
     protected $_port;
 
 
     /**
      * Local client hostname or i.p.
      *
      * @var string
      */
     protected $_name = 'localhost';
 
 
     /**
      * Authentication type OPTIONAL
      *
      * @var string
      */
     protected $_auth;
 
 
     /**
      * Config options for authentication
      *
      * @var array
      */
     protected $_config;
 
 
     /**
      * Instance of Zend_Mail_Protocol_Smtp
      *
      * @var Zend_Mail_Protocol_Smtp
      */
     protected $_connection;
 
 
     /**
      * Constructor.
      *
      * @param  string $host OPTIONAL (Default: 127.0.0.1)
      * @param  array|null $config OPTIONAL (Default: null)
      * @return void
      *
      * @todo Someone please make this compatible
      *       with the SendMail transport class.
      */
     public function __construct($host = '127.0.0.1', Array $config = array())
     {
         if (isset($config['name'])) {
             $this->_name = $config['name'];
         }
         if (isset($config['port'])) {
             $this->_port = $config['port'];
         }
         if (isset($config['auth'])) {
             $this->_auth = $config['auth'];
         }
 
         $this->_host = $host;
         $this->_config = $config;
     }
 
 
     /**
      * Class destructor to ensure all open connections are closed
      *
      * @return void
      */
     public function __destruct()
     {
         if ($this->_connection instanceof Zend_Mail_Protocol_Smtp) {
             try {
                 $this->_connection->quit();
             } catch (Zend_Mail_Protocol_Exception $e) {
                 // ignore
             }
             $this->_connection->disconnect();
         }
     }
 
 
     /**
      * Sets the connection protocol instance
      *
      * @param Zend_Mail_Protocol_Abstract $client
      *
      * @return void
      */
     public function setConnection(Zend_Mail_Protocol_Abstract $connection)
     {
         $this->_connection = $connection;
     }
 
 
     /**
      * Gets the connection protocol instance
      *
      * @return Zend_Mail_Protocol|null
      */
     public function getConnection()
     {
         return $this->_connection;
     }
 
     /**
      * Send an email via the SMTP connection protocol
      *
      * The connection via the protocol adapter is made just-in-time to allow a
      * developer to add a custom adapter if required before mail is sent.
      *
      * @return void
      * @todo Rename this to sendMail, it's a public method...
      */
     public function _sendMail()
     {
         // If sending multiple messages per session use existing adapter
         if (!($this->_connection instanceof Zend_Mail_Protocol_Smtp)) {
             // Check if authentication is required and determine required class
             $connectionClass = 'Zend_Mail_Protocol_Smtp';
             if ($this->_auth) {
                 $connectionClass .= '_Auth_' . ucwords($this->_auth);
             }
             if (!class_exists($connectionClass)) {
                 // require_once 'Zend/Loader.php';
                 Zend_Loader::loadClass($connectionClass);
             }
             $this->setConnection(new $connectionClass($this->_host, $this->_port, $this->_config));
             $this->_connection->connect();
             $this->_connection->helo($this->_name);
         } else {
             // Reset connection to ensure reliable transaction
             $this->_connection->rset();
         }
 
         // Set sender email address
         $this->_connection->mail($this->_mail->getReturnPath());
 
         // Set recipient forward paths
         foreach ($this->_mail->getRecipients() as $recipient) {
             $this->_connection->rcpt($recipient);
         }
 
         // Issue DATA command to client
         $this->_connection->data($this->header . Zend_Mime::LINEEND . $this->body);
     }
 
     /**
      * Format and fix headers
      *
      * Some SMTP servers do not strip BCC headers. Most clients do it themselves as do we.
      *
      * @access  protected
      * @param   array $headers
      * @return  void
      * @throws  Zend_Transport_Exception
      */
     protected function _prepareHeaders($headers)
     {
         if (!$this->_mail) {
             /**
              * @see Zend_Mail_Transport_Exception
              */
             // require_once 'Zend/Mail/Transport/Exception.php';
             throw new Zend_Mail_Transport_Exception('_prepareHeaders requires a registered Zend_Mail object');
         }
 
         unset($headers['Bcc']);
 
         // Prepare headers
         parent::_prepareHeaders($headers);
     }
 }