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444 lines
12 KiB
PHP
444 lines
12 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Mail
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* @subpackage Protocol
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* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/**
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* @see Zend_Mime
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*/
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require_once 'Zend/Mime.php';
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/**
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* @see Zend_Mail_Protocol_Abstract
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*/
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require_once 'Zend/Mail/Protocol/Abstract.php';
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/**
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* Smtp implementation of Zend_Mail_Protocol_Abstract
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*
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* Minimum implementation according to RFC2821: EHLO, MAIL FROM, RCPT TO, DATA, RSET, NOOP, QUIT
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*
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* @category Zend
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* @package Zend_Mail
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* @subpackage Protocol
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* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Mail_Protocol_Smtp extends Zend_Mail_Protocol_Abstract
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{
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/**
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* The transport method for the socket
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*
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* @var string
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*/
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protected $_transport = 'tcp';
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/**
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* Indicates that a session is requested to be secure
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*
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* @var string
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*/
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protected $_secure;
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/**
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* Indicates an smtp session has been started by the HELO command
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*
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* @var boolean
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*/
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protected $_sess = false;
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/**
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* Indicates the HELO command has been issues
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*
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* @var unknown_type
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*/
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protected $_helo = false;
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/**
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* Indicates an smtp AUTH has been issued and authenticated
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*
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* @var unknown_type
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*/
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protected $_auth = false;
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/**
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* Indicates a MAIL command has been issued
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*
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* @var unknown_type
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*/
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protected $_mail = false;
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/**
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* Indicates one or more RCTP commands have been issued
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*
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* @var unknown_type
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*/
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protected $_rcpt = false;
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/**
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* Indicates that DATA has been issued and sent
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*
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* @var unknown_type
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*/
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protected $_data = null;
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/**
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* Constructor.
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*
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* @param string $host
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* @param integer $port
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* @param array $config
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* @return void
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* @throws Zend_Mail_Protocol_Exception
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*/
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public function __construct($host = '127.0.0.1', $port = null, array $config = array())
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{
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if (isset($config['ssl'])) {
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switch (strtolower($config['ssl'])) {
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case 'tls':
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$this->_secure = 'tls';
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break;
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case 'ssl':
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$this->_transport = 'ssl';
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$this->_secure = 'ssl';
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if ($port == null) {
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$port = 465;
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}
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break;
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default:
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/**
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* @see Zend_Mail_Protocol_Exception
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*/
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require_once 'Zend/Mail/Protocol/Exception.php';
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throw new Zend_Mail_Protocol_Exception($config['ssl'] . ' is unsupported SSL type');
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break;
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}
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}
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// If no port has been specified then check the master PHP ini file. Defaults to 25 if the ini setting is null.
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if ($port == null) {
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if (($port = ini_get('smtp_port')) == '') {
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$port = 25;
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}
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}
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parent::__construct($host, $port);
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}
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/**
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* Connect to the server with the parameters given in the constructor.
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*
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* @return boolean
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*/
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public function connect()
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{
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return $this->_connect($this->_transport . '://' . $this->_host . ':'. $this->_port);
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}
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/**
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* Initiate HELO/EHLO sequence and set flag to indicate valid smtp session
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*
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* @param string $host The client hostname or IP address (default: 127.0.0.1)
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* @throws Zend_Mail_Protocol_Exception
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* @return void
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*/
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public function helo($host = '127.0.0.1')
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{
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// Respect RFC 2821 and disallow HELO attempts if session is already initiated.
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if ($this->_sess === true) {
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/**
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* @see Zend_Mail_Protocol_Exception
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*/
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require_once 'Zend/Mail/Protocol/Exception.php';
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throw new Zend_Mail_Protocol_Exception('Cannot issue HELO to existing session');
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}
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// Validate client hostname
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//if (!$this->_validHost->isValid($host)) {
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/**
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* @see Zend_Mail_Protocol_Exception
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*/
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//require_once 'Zend/Mail/Protocol/Exception.php';
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//throw new Zend_Mail_Protocol_Exception(join(', ', $this->_validHost->getMessages()));
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//}
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// Initiate helo sequence
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$this->_expect(220, 300); // Timeout set for 5 minutes as per RFC 2821 4.5.3.2
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$this->_ehlo($host);
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// If a TLS session is required, commence negotiation
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if ($this->_secure == 'tls') {
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$this->_send('STARTTLS');
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$this->_expect(220, 180);
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if (!stream_socket_enable_crypto($this->_socket, true, STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT)) {
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/**
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* @see Zend_Mail_Protocol_Exception
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*/
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require_once 'Zend/Mail/Protocol/Exception.php';
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throw new Zend_Mail_Protocol_Exception('Unable to connect via TLS');
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}
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$this->_ehlo($host);
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}
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$this->_startSession();
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$this->auth();
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}
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/**
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* Send EHLO or HELO depending on capabilities of smtp host
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*
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* @param string $host The client hostname or IP address (default: 127.0.0.1)
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* @throws Zend_Mail_Protocol_Exception
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* @return void
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*/
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protected function _ehlo($host)
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{
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// Support for older, less-compliant remote servers. Tries multiple attempts of EHLO or HELO.
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try {
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$this->_send('EHLO ' . $host);
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$this->_expect(250, 300); // Timeout set for 5 minutes as per RFC 2821 4.5.3.2
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} catch (Zend_Mail_Protocol_Exception $e) {
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$this->_send('HELO ' . $host);
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$this->_expect(250, 300); // Timeout set for 5 minutes as per RFC 2821 4.5.3.2
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} catch (Zend_Mail_Protocol_Exception $e) {
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throw $e;
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}
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}
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/**
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* Issues MAIL command
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*
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* @param string $from Sender mailbox
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* @throws Zend_Mail_Protocol_Exception
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* @return void
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*/
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public function mail($from)
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{
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if ($this->_sess !== true) {
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/**
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* @see Zend_Mail_Protocol_Exception
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*/
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require_once 'Zend/Mail/Protocol/Exception.php';
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throw new Zend_Mail_Protocol_Exception('A valid session has not been started');
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}
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$this->_send('MAIL FROM:<' . $from . '>');
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$this->_expect(250, 300); // Timeout set for 5 minutes as per RFC 2821 4.5.3.2
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// Set mail to true, clear recipients and any existing data flags as per 4.1.1.2 of RFC 2821
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$this->_mail = true;
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$this->_rcpt = false;
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$this->_data = false;
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}
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/**
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* Issues RCPT command
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*
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* @param string $to Receiver(s) mailbox
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* @throws Zend_Mail_Protocol_Exception
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* @return void
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*/
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public function rcpt($to)
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{
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if ($this->_mail !== true) {
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/**
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* @see Zend_Mail_Protocol_Exception
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*/
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require_once 'Zend/Mail/Protocol/Exception.php';
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throw new Zend_Mail_Protocol_Exception('No sender reverse path has been supplied');
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}
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// Set rcpt to true, as per 4.1.1.3 of RFC 2821
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$this->_send('RCPT TO:<' . $to . '>');
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$this->_expect(array(250, 251), 300); // Timeout set for 5 minutes as per RFC 2821 4.5.3.2
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$this->_rcpt = true;
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}
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/**
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* Issues DATA command
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*
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* @param string $data
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* @throws Zend_Mail_Protocol_Exception
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* @return void
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*/
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public function data($data)
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{
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// Ensure recipients have been set
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if ($this->_rcpt !== true) {
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/**
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* @see Zend_Mail_Protocol_Exception
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*/
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require_once 'Zend/Mail/Protocol/Exception.php';
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throw new Zend_Mail_Protocol_Exception('No recipient forward path has been supplied');
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}
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$this->_send('DATA');
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$this->_expect(354, 120); // Timeout set for 2 minutes as per RFC 2821 4.5.3.2
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foreach (explode(Zend_Mime::LINEEND, $data) as $line) {
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if (strpos($line, '.') === 0) {
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// Escape lines prefixed with a '.'
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$line = '.' . $line;
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}
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$this->_send($line);
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}
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$this->_send('.');
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$this->_expect(250, 600); // Timeout set for 10 minutes as per RFC 2821 4.5.3.2
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$this->_data = true;
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}
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/**
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* Issues the RSET command and validates answer
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*
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* Can be used to restore a clean smtp communication state when a transaction has been cancelled or commencing a new transaction.
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*
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* @return void
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*/
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public function rset()
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{
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$this->_send('RSET');
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// MS ESMTP doesn't follow RFC, see [ZF-1377]
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$this->_expect(array(250, 220));
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$this->_mail = false;
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$this->_rcpt = false;
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$this->_data = false;
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}
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/**
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* Issues the NOOP command and validates answer
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*
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* Not used by Zend_Mail, could be used to keep a connection alive or check if it is still open.
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*
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* @return void
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*/
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public function noop()
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{
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$this->_send('NOOP');
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$this->_expect(250, 300); // Timeout set for 5 minutes as per RFC 2821 4.5.3.2
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}
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/**
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* Issues the VRFY command and validates answer
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*
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* Not used by Zend_Mail.
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*
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* @param string $user User Name or eMail to verify
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* @return void
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*/
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public function vrfy($user)
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{
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$this->_send('VRFY ' . $user);
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$this->_expect(array(250, 251, 252), 300); // Timeout set for 5 minutes as per RFC 2821 4.5.3.2
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}
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/**
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* Issues the QUIT command and clears the current session
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*
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* @return void
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*/
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public function quit()
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{
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if ($this->_sess) {
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$this->_send('QUIT');
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$this->_expect(221, 300); // Timeout set for 5 minutes as per RFC 2821 4.5.3.2
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$this->_stopSession();
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}
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}
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/**
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* Default authentication method
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*
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* This default method is implemented by AUTH adapters to properly authenticate to a remote host.
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*
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* @throws Zend_Mail_Protocol_Exception
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* @return void
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*/
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public function auth()
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{
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if ($this->_auth === true) {
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/**
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* @see Zend_Mail_Protocol_Exception
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*/
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require_once 'Zend/Mail/Protocol/Exception.php';
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throw new Zend_Mail_Protocol_Exception('Already authenticated for this session');
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}
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}
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/**
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* Closes connection
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*
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* @return void
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*/
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public function disconnect()
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{
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$this->_disconnect();
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}
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/**
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* Start mail session
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*
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* @return void
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*/
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protected function _startSession()
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{
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$this->_sess = true;
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}
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/**
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* Stop mail session
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*
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* @return void
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*/
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protected function _stopSession()
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{
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$this->_sess = false;
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}
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}
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