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/**
 * 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) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Smtp.php 24594 2012-01-05 21:27:01Z matthew $
 */


/**
 * @see Zend_Mime
 */
//--//require_once &#039;Zend/Mime.php&#039;;

/**
 * @see Zend_Mail_Protocol_Smtp
 */
//--//require_once &#039;Zend/Mail/Protocol/Smtp.php&#039;;

/**
 * @see Zend_Mail_Transport_Abstract
 */
//--//require_once &#039;Zend/Mail/Transport/Abstract.php&#039;;


/**
 * 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) 2005-2012 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 = &quot;\n&quot;;

    /**
     * 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 = &#039;localhost&#039;;


    /**
     * 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 = &#039;127.0.0.1&#039;, Array $config = array())
    {
        if (isset($config[&#039;name&#039;])) {
            $this-&gt;_name = $config[&#039;name&#039;];
        }
        if (isset($config[&#039;port&#039;])) {
            $this-&gt;_port = $config[&#039;port&#039;];
        }
        if (isset($config[&#039;auth&#039;])) {
            $this-&gt;_auth = $config[&#039;auth&#039;];
        }

        $this-&gt;_host = $host;
        $this-&gt;_config = $config;
    }


    /**
     * Class destructor to ensure all open connections are closed
     *
     * @return void
     */
    public function __destruct()
    {
        if ($this-&gt;_connection instanceof Zend_Mail_Protocol_Smtp) {
            try {
                $this-&gt;_connection-&gt;quit();
            } catch (Zend_Mail_Protocol_Exception $e) {
                // ignore
            }
            $this-&gt;_connection-&gt;disconnect();
        }
    }


    /**
     * Sets the connection protocol instance
     *
     * @param Zend_Mail_Protocol_Abstract $client
     *
     * @return void
     */
    public function setConnection(Zend_Mail_Protocol_Abstract $connection)
    {
        $this-&gt;_connection = $connection;
    }


    /**
     * Gets the connection protocol instance
     *
     * @return Zend_Mail_Protocol|null
     */
    public function getConnection()
    {
        return $this-&gt;_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&#039;s a public method...
     */
    public function _sendMail()
    {
        // If sending multiple messages per session use existing adapter
        if (!($this-&gt;_connection instanceof Zend_Mail_Protocol_Smtp)) {
            // Check if authentication is required and determine required class
            $connectionClass = &#039;Zend_Mail_Protocol_Smtp&#039;;
            if ($this-&gt;_auth) {
                $connectionClass .= &#039;_Auth_&#039; . ucwords($this-&gt;_auth);
            }
            if (!class_exists($connectionClass)) {
                //--//require_once &#039;Zend/Loader.php&#039;;
                Zend_Loader::loadClass($connectionClass);
            }
            $this-&gt;setConnection(new $connectionClass($this-&gt;_host, $this-&gt;_port, $this-&gt;_config));
            $this-&gt;_connection-&gt;connect();
            $this-&gt;_connection-&gt;helo($this-&gt;_name);
        } else {
            // Reset connection to ensure reliable transaction
            $this-&gt;_connection-&gt;rset();
        }

        // Set sender email address
        $this-&gt;_connection-&gt;mail($this-&gt;_mail-&gt;getReturnPath());

        // Set recipient forward paths
        foreach ($this-&gt;_mail-&gt;getRecipients() as $recipient) {
            $this-&gt;_connection-&gt;rcpt($recipient);
        }

        // Issue DATA command to client
        $this-&gt;_connection-&gt;data($this-&gt;header . Zend_Mime::LINEEND . $this-&gt;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-&gt;_mail) {
            /**
             * @see Zend_Mail_Transport_Exception
             */
            //--//require_once &#039;Zend/Mail/Transport/Exception.php&#039;;
            throw new Zend_Mail_Transport_Exception(&#039;_prepareHeaders requires a registered Zend_Mail object&#039;);
        }

        unset($headers[&#039;Bcc&#039;]);

        // Prepare headers
        parent::_prepareHeaders($headers);
    }
}
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