<?php
/**
* @version	$Id: email_send.php 15137 2012-03-04 08:06:21Z alex $
* @package	In-Portal
* @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
* @license      GNU/GPL
* In-Portal is Open Source software.
* This means that this software may have been modified pursuant
* the GNU General Public License, and as distributed it includes
* or is derivative of works licensed under the GNU General Public License
* or other free or open source software licenses.
* See http://www.in-portal.org/license for copyright notices and details.
*/

	defined('FULL_PATH') or die('restricted access!');

	/**
	 * Class used to compose email message (using MIME standarts) and send it via mail function or via SMTP server
	 *
	 */
	class kEmailSendingHelper extends kHelper {

		/**
		 * headers of main header part
		 *
		 * @var Array
		 */
		var $headers = Array ();

		/**
		 * Tells if all message parts were combined together
		 *
		 * @var int
		 */
		var $bodyPartNumber = false;

		/**
		 * Composed message parts
		 *
		 * @var Array
		 */
		var $parts = Array();

		/**
		 * Lines separator by MIME standart
		 *
		 * @var string
		 */
		var $line_break = "\n";

		/**
		 * Charset used for message composing
		 *
		 * @var string
		 */
		var $charset = 'utf-8';

		/**
		 * Name of mailer program (X-Mailer header)
		 *
		 * @var string
		 */
		var $mailerName = '';

		/**
		 * Options used for message content-type & structure guessing
		 *
		 * @var Array
		 */
		var $guessOptions = Array ();

		/**
		 * Send messages using selected method
		 *
		 * @var string
		 */
		var $sendMethod = 'Mail';

		/**
		 * Parameters used to initiate SMTP server connection
		 *
		 * @var Array
		 */
		var $smtpParams = Array ();

	    /**
	     * List of supported authentication methods, in preferential order.
	     * @var array
	     * @access public
	     */
	    var $smtpAuthMethods = Array('CRAM-MD5', 'LOGIN', 'PLAIN');

	    /**
	     * The socket resource being used to connect to the SMTP server.
	     * @var kSocket
	     * @access private
	     */
	    var $smtpSocket = null;

	    /**
	     * The most recent server response code.
	     * @var int
	     * @access private
	     */
	    var $smtpResponceCode = -1;

	    /**
	     * The most recent server response arguments.
	     * @var array
	     * @access private
	     */
	    var $smtpRespoceArguments = Array();

	    /**
	     * Stores detected features of the SMTP server.
	     * @var array
	     * @access private
	     */
	    var $smtpFeatures = Array();

	    /**
	     * Stores log data
		 *
	     * @var Array
	     * @access protected
	     */
	    protected $_logData = Array ();

		public function __construct()
		{
			parent::__construct();

			// set default guess options
			$this->guessOptions = Array (
				'attachments'			=>	Array (),
				'inline_attachments'	=>	Array (),
				'text_part'				=>	false,
				'html_part'				=>	false,
			);

			// read SMTP server connection params from config
			$smtp_mapping = Array ('server' => 'Smtp_Server', 'port' => 'Smtp_Port');
			if ($this->Application->ConfigValue('Smtp_Authenticate')) {
				$smtp_mapping['username'] = 'Smtp_User';
				$smtp_mapping['password'] = 'Smtp_Pass';
			}

			foreach ($smtp_mapping as $smtp_name => $config_name) {
				$this->smtpParams[$smtp_name] = $this->Application->ConfigValue($config_name);
			}
			$this->smtpParams['use_auth'] = isset($this->smtpParams['username']) ? true : false;
			$this->smtpParams['localhost'] = 'localhost'; // The value to give when sending EHLO or HELO.

			$this->sendMethod = $this->smtpParams['server'] && $this->smtpParams['port'] ? 'SMTP' : 'Mail';

			if ($this->sendMethod == 'SMTP') {
				// create connection object if we will use SMTP
				$this->smtpSocket = $this->Application->makeClass('Socket');
			}

			$this->SetCharset(null, true);
		}


		/**
		 * Returns new message id header by sender's email address
		 *
		 * @param string $email_address email address
		 * @return string
		 */
		function GenerateMessageID($email_address)
		{
			list ($micros, $seconds) = explode(' ', microtime());
			list ($user, $domain) = explode('@', $email_address, 2);

			$message_id = strftime('%Y%m%d%H%M%S', $seconds).substr($micros, 1, 5).'.'.preg_replace('/[^A-Za-z]+/', '-', $user).'@'.$domain;

			$this->SetHeader('Message-ID', '<'.$message_id.'>');
		}

		/**
		 * Returns extension of given filename
		 *
		 * @param string $filename
		 * @return string
		 */
		function GetFilenameExtension($filename)
		{
			$last_dot = mb_strrpos($filename, '.');
			return $last_dot !== false ? mb_substr($filename, $last_dot + 1) : '';
		}

		/**
		 * Creates boundary for part by number (only if it's missing)
		 *
		 * @param int $part_number
		 *
		 */

		function CreatePartBoundary($part_number)
		{
			$part =& $this->parts[$part_number];
			if (!isset($part['BOUNDARY'])) {
				$part['BOUNDARY'] = md5(uniqid($part_number.time()));

			}
		}

		/**
		 * Returns ready to use headers associative array of any message part by it's number
		 *
		 * @param int $part_number
		 * @return Array
		 */
		function GetPartHeaders($part_number)
		{
			$part =& $this->parts[$part_number];

			if (!isset($part['Content-Type'])) {
				return $this->SetError('MISSING_CONTENT_TYPE');
			}

			$full_type = strtolower($part['Content-Type']);
			list ($type, $sub_type) = explode('/', $full_type);

			$headers['Content-Type'] = $full_type;
			switch ($type) {
				case 'text':
				case 'image':
				case 'audio':
				case 'video':
				case 'application':
				case 'message':
					// 1. update content-type header
					if (isset($part['CHARSET'])) {
						$headers['Content-Type'] .= '; charset='.$part['CHARSET'];
					}
					if (isset($part['NAME'])) {
						$headers['Content-Type'] .= '; name="'.$part['NAME'].'"';
					}

					// 2. set content-transfer-encoding header
					if (isset($part['Content-Transfer-Encoding'])) {
						$headers['Content-Transfer-Encoding'] = $part['Content-Transfer-Encoding'];
					}

					// 3. set content-disposition header
					if (isset($part['DISPOSITION']) && $part['DISPOSITION']) {
						$headers['Content-Disposition'] = $part['DISPOSITION'];
						if (isset($part['NAME'])) {
							$headers['Content-Disposition'] .= '; filename="'.$part['NAME'].'"';
						}
					}
					break;

				case 'multipart':
					switch ($sub_type) {
						case 'alternative':
						case 'related':
						case 'mixed':
						case 'parallel':
							$this->CreatePartBoundary($part_number);
							$headers['Content-Type'] .= '; boundary="'.$part['BOUNDARY'].'"';
							break;

						default:
							return $this->SetError('INVALID_MULTIPART_SUBTYPE', Array($sub_type));
					}
					break;

				default:
					return $this->SetError('INVALID_CONTENT_TYPE', Array($full_type));
			}

			// set content-id if any
			if (isset($part['Content-ID'])) {
				$headers['Content-ID'] = '<'.$part['Content-ID'].'>';
			}

			return $headers;
		}

		function GetPartBody($part_number)
		{
			$part =& $this->parts[$part_number];

			if (!isset($part['Content-Type'])) {
				return $this->SetError('MISSING_CONTENT_TYPE');
			}

			$full_type = strtolower($part['Content-Type']);
			list ($type, $sub_type) = explode('/', $full_type);

			$body = '';
			switch ($type) {
				// compose text/binary content
				case 'text':
				case 'image':
				case 'audio':
				case 'video':
				case 'application':
				case 'message':
					// 1. get content of part
					if (isset($part['FILENAME'])) {
						// content provided via absolute path to content containing file
						$filename = $part['FILENAME'];
						$file_size = filesize($filename);

						$body = file_get_contents($filename);
						if ($body === false) {
							return $this->SetError('FILE_PART_OPEN_ERROR', Array($filename));
						}

						$actual_size = strlen($body);
						if (($file_size === false || $actual_size > $file_size) && get_magic_quotes_runtime()) {
							$body = stripslashes($body);
						}

						if ($file_size !== false && $actual_size != $file_size) {
							return $this->SetError('FILE_PART_DATA_ERROR', Array($filename));
						}
					}
					else {
						// content provided directly as one of part keys
						if (!isset($part['DATA'])) {
							return $this->SetError('FILE_PART_DATA_MISSING');
						}
						$body =& $part['DATA'];
					}

					// 2. get part transfer encoding
					$encoding = isset($part['Content-Transfer-Encoding']) ? strtolower($part['Content-Transfer-Encoding']) : '';
					if (!in_array($encoding, Array ('', 'base64', 'quoted-printable', '7bit'))) {
						return $this->SetError('INVALID_ENCODING', Array($encoding));
					}

					if ($encoding == 'base64') {
						// split base64 encoded text by 76 symbols at line (MIME requirement)
						$body = chunk_split( base64_encode($body) );
					}
					break;

				case 'multipart':
					// compose multipart message
					switch ($sub_type) {
						case 'alternative':
						case 'related':
						case 'mixed':
						case 'parallel':
							$this->CreatePartBoundary($part_number);
							$boundary = $this->line_break.'--'.$part['BOUNDARY'];

							foreach ($part['PARTS'] as $multipart_number) {
								$body .= $boundary.$this->line_break;
								$part_headers = $this->GetPartHeaders($multipart_number);
								if ($part_headers === false) {
									// some of sub-part headers were invalid
									return false;
								}

								foreach ($part_headers as $header_name => $header_value) {
									$body .= $header_name.': '.$header_value.$this->line_break;
								}

								$part_body = $this->GetPartBody($multipart_number);
								if ($part_body === false) {
									// part body was invalid
									return false;
								}

								$body .= $this->line_break.$part_body;
							}
							$body .= $boundary.'--'.$this->line_break;
							break;

						default:
							return $this->SetError('INVALID_MULTIPART_SUBTYPE', Array($sub_type));
					}
					break;
				default:
					return $this->SetError('INVALID_CONTENT_TYPE', Array($full_type));
			}

			return $body;
		}

		/**
		 * Applies quoted-printable encoding to specified text
		 *
		 * @param string $text
		 * @param string $header_charset
		 * @param int $break_lines
		 * @return unknown
		 */
		function QuotedPrintableEncode($text, $header_charset = '', $break_lines = 1)
		{
			$ln = strlen($text);
			$h = strlen($header_charset) > 0;
			if ($h) {
				$s = Array (
					'=' => 1,
					'?' => 1,
					'_' => 1,
					'(' => 1,
					')' => 1,
					'<' => 1,
					'>' => 1,
					'@' => 1,
					',' => 1,
					';' => 1,
					'"' => 1,
					'\\' => 1,
	/*
					'/' => 1,
					'[' => 1,
					']' => 1,
					':' => 1,
					'.' => 1,
	*/
				);

				$b = $space = $break_lines = 0;
				for ($i = 0; $i < $ln; $i++) {
					if (isset($s[$text[$i]])) {
						$b = 1;
						break;
					}

					switch ($o = ord($text[$i])) {
						case 9:
						case 32:
							$space = $i + 1;
							$b = 1;
							break 2;
						case 10:
						case 13:
							break 2;
						default:
						if ($o < 32 || $o > 127) {
							$b = 1;
							break 2;
						}
					}
				}

				if($i == $ln) {
					return $text;
				}

				if ($space > 0) {
					return substr($text, 0, $space).($space < $ln ? $this->QuotedPrintableEncode(substr($text, $space), $header_charset, 0) : '');
				}
			}

			for ($w = $e = '', $n = 0, $l = 0, $i = 0; $i < $ln; $i++) {
				$c = $text[$i];
				$o = ord($c);
				$en = 0;
				switch ($o) {
					case 9:
					case 32:
						if (!$h) {
							$w = $c;
							$c = '';
						}
						else {
							if ($b) {
								if ($o == 32) {
									$c = '_';
								}
								else {
									$en = 1;
								}
							}
						}
						break;
					case 10:
					case 13:
						if (strlen($w)) {
							if ($break_lines && $l + 3 > 75) {
								$e .= '='.$this->line_break;
								$l = 0;
							}

							$e .= sprintf('=%02X', ord($w));
							$l += 3;
							$w = '';
						}

						$e .= $c;
						if ($h) {
							$e .= "\t";
						}
						$l = 0;
						continue 2;
					case 46:
					case 70:
					case 102:
						$en = (!$h && ($l == 0 || $l + 1 > 75));
						break;
					default:
						if ($o > 127 || $o < 32 || !strcmp($c, '=')) {
							$en = 1;
						}
						elseif ($h && isset($s[$c])) {
							$en = 1;
						}
						break;
				}

				if (strlen($w)) {
					if ($break_lines && $l + 1 > 75) {
						$e .= '='.$this->line_break;
						$l = 0;
					}
					$e .= $w;
					$l++;
					$w = '';
				}

				if (strlen($c)) {
					if ($en) {
						$c = sprintf('=%02X', $o);
						$el = 3;
						$n = 1;
						$b = 1;
					}
					else {
						$el = 1;
					}
					if ($break_lines && $l + $el > 75) {
						$e .= '='.$this->line_break;
						$l = 0;
					}
					$e .= $c;
					$l += $el;
				}
			}
			if (strlen($w)) {
				if ($break_lines && $l + 3 > 75) {
					$e .= '='.$this->line_break;
				}
				$e .= sprintf('=%02X', ord($w));
			}

			return $h && $n ? '=?'.$header_charset.'?q?'.$e.'?=' : $e;
		}

		/**
		 * Sets message header + encodes is by quoted-printable using charset specified
		 *
		 * @param string $name
		 * @param string $value
		 * @param string $encoding_charset
		 */
		function SetHeader($name, $value, $encoding_charset = '')
		{
			if ($encoding_charset) {
				// actually for headers base64 method may give shorter result
				$value = $this->QuotedPrintableEncode($value, $encoding_charset);
			}

			$this->headers[$name] = $value;
		}

		/**
		 * Sets header + automatically encodes it using default charset
		 *
		 * @param string $name
		 * @param string $value
		 */
		function SetEncodedHeader($name, $value)
		{
			$this->SetHeader($name, $value, $this->charset);
		}

		/**
		 * Sets header which value is email and username +autoencode
		 *
		 * @param string $header
		 * @param string $address
		 * @param string $name
		 */
		function SetEncodedEmailHeader($header, $address, $name)
		{
			$this->SetHeader($header, $this->QuotedPrintableEncode($name, $this->charset).' <'.$address.'>');
		}

		function SetMultipleEncodedEmailHeader($header, $addresses)
		{
			$value = '';
			foreach ($addresses as $name => $address) {
				$value .= $this->QuotedPrintableEncode($name, $this->charset).' <'.$address.'>, ';
			}

			$this->SetHeader($header, substr($value, 0, -2));
		}


		/**
		 * Adds new part to message and returns it's number
		 *
		 * @param Array $part_definition
		 * @param int|bool $part_number number of new part
		 * @return int
		 */
		function AddPart(&$part_definition, $part_number = false)
		{
			$part_number = $part_number !== false ? $part_number : count($this->parts);
			$this->parts[$part_number] =& $part_definition;
			return $part_number;
		}

		/**
		 * Returns text version of HTML document
		 *
		 * @param string $html
		 * @return string
		 */
		function ConvertToText($html)
		{
			$search = Array (
				"'(<\/td>.*)[\r\n]+(.*<td)'i",//formating text in tables
				"'(<br[ ]?[\/]?>[\r\n]{0,2})|(<\/p>)|(<\/div>)|(<\/tr>)'i",
				"'<head>(.*?)</head>'si",
				"'<style(.*?)</style>'si",
				"'<title>(.*?)</title>'si",
				"'<script(.*?)</script>'si",
//				"'^[\s\n\r\t]+'", //strip all spacers & newlines in the begin of document
//				"'[\s\n\r\t]+$'", //strip all spacers & newlines in the end of document
				"'&(quot|#34);'i",
				"'&(amp|#38);'i",
				"'&(lt|#60);'i",
				"'&(gt|#62);'i",
				"'&(nbsp|#160);'i",
				"'&(iexcl|#161);'i",
				"'&(cent|#162);'i",
				"'&(pound|#163);'i",
				"'&(copy|#169);'i",
				"'&#(\d+);'e"
			);

			$replace = Array (
				"\\1\t\\2",
				"\n",
				"",
				"",
				"",
				"",
//				"",
//				"",
				"\"",
				"&",
				"<",
				">",
				" ",
				chr(161),
				chr(162),
				chr(163),
				chr(169),
				"chr(\\1)"
			);

			return strip_tags( preg_replace ($search, $replace, $html) );
		}

		/**
		 * Add text OR html part to message (optionally encoded)
		 *
		 * @param string $text part's text
		 * @param bool $is_html this html part or not
		 * @param bool $encode encode message using quoted-printable encoding
		 *
		 * @return int number of created part
		 */
		function CreateTextHtmlPart($text, $is_html = false, $encode = true)
		{
			if ($is_html) {
				// if adding HTML part, then create plain-text part too
				$this->CreateTextHtmlPart($this->ConvertToText($text));
			}

			// in case if text is from $_REQUEST, then line endings are "\r\n", but we need "\n" here

			$text = str_replace("\r\n", "\n", $text); // possible case
			$text = str_replace("\r", "\n", $text); // impossible case, but just in case replace this too

			$definition = Array (
				'Content-Type'	=>	$is_html ? 'text/html' : 'text/plain',
				'CHARSET'		=>	$this->charset,
				'DATA'			=>	$encode ? $this->QuotedPrintableEncode($text) : $text,
			);

			if ($encode) {
				$definition['Content-Transfer-Encoding'] = 'quoted-printable';
			}

			$guess_name = $is_html ? 'html_part' : 'text_part';
			$part_number = $this->guessOptions[$guess_name] !== false ? $this->guessOptions[$guess_name] : false;

			$part_number = $this->AddPart($definition, $part_number);
			$this->guessOptions[$guess_name] = $part_number;

			return $part_number;
		}

		/**
		 * Adds attachment part to message
		 *
		 * @param string $file name of the file with attachment body
		 * @param string $attach_name name for attachment (name of file is used, when not specified)
		 * @param string $content_type content type for attachment
		 * @param string $content body of file to be attached
		 * @param bool $inline is attachment inline or not
		 *
		 * @return int number of created part
		 */
		function AddAttachment($file = '', $attach_name = '', $content_type = '', $content = '', $inline = false)
		{
			$definition = Array (
				'Disposition'	=>	$inline ? 'inline' : 'attachment',
				'Content-Type'	=>	$content_type ? $content_type : 'automatic/name',
			);

			if ($file) {
				// filename of attachment given
				$definition['FileName'] = $file;
			}

			if ($attach_name) {
				// name of attachment given
				$definition['Name'] = $attach_name;
			}

			if ($content) {
				// attachment data is given
				$definition['Data'] = $content;
			}

			$definition =& $this->GetFileDefinition($definition);
			$part_number = $this->AddPart($definition);

			if ($inline) {
				// it's inline attachment and needs content-id to be addressed by in message
				$this->parts[$part_number]['Content-ID'] = md5(uniqid($part_number.time())).'.'.$this->GetFilenameExtension($attach_name ? $attach_name : $file);
			}

			$this->guessOptions[$inline ? 'inline_attachments' : 'attachments'][] = $part_number;

			return $part_number;
		}

		/**
		 * Adds another MIME message as attachment to message being composed
		 *
		 * @param string $file name of the file with attachment body
		 * @param string $attach_name name for attachment (name of file is used, when not specified)
		 * @param string $content body of file to be attached
		 *
		 * @return int number of created part
		 */
		function AddMessageAttachment($file = '', $attach_name = '', $content = '')
		{
			$part_number = $this->AddAttachment($file, $attach_name, 'message/rfc822', $content, true);
			unset($this->parts[$part_number]['Content-ID']); // messages don't have content-id, but have inline disposition
			return $part_number;
		}

		/**
		 * Creates multipart of specified type and returns it's number
		 *
		 * @param Array $part_numbers
		 * @param string $multipart_type = {alternative,related,mixed,paralell}
		 * @return int
		 */
		function CreateMultipart($part_numbers, $multipart_type)
		{
			$types = Array ('alternative', 'related' , 'mixed', 'paralell');
			if (!in_array($multipart_type, $types)) {
				return $this->SetError('INVALID_MULTIPART_SUBTYPE', Array($multipart_type));
			}

			$definition = Array (
				'Content-Type'	=>	'multipart/'.$multipart_type,
				'PARTS'			=>	$part_numbers,
			);

			return $this->AddPart($definition);
		}

		/**
		 * Creates missing content-id header for inline attachments
		 *
		 * @param int $part_number
		 */
		function CreateContentID($part_number)
		{
			$part =& $this->parts[$part_number];
			if (!isset($part['Content-ID']) && $part['DISPOSITION'] == 'inline') {
				$part['Content-ID'] = md5(uniqid($part_number.time())).'.'.$this->GetFilenameExtension($part['NAME']);
			}
		}

		/**
		 * Returns attachment part based on file used in attachment
		 *
		 * @param Array $file
		 * @return Array
		 */
		function &GetFileDefinition ($file)
		{
			$name = '';
			if (isset($file['Name'])) {
				// if name is given directly, then use it
				$name = $file['Name'];
			}
			else {
				// auto-guess attachment name based on source filename
				$name = isset($file['FileName']) ? basename($file['FileName']) : '';
			}

			if (!$name || (!isset($file['FileName']) && !isset($file['Data']))) {
				// filename not specified || no filename + no direct file content
				return $this->SetError('MISSING_FILE_DATA');
			}

			$encoding = 'base64';
			if (isset($file['Content-Type'])) {
				$content_type = $file['Content-Type'];
				list ($type, $sub_type) = explode('/', $content_type);

				switch ($type) {
					case 'text':
					case 'image':
					case 'audio':
					case 'video':
					case 'application':
						break;

					case 'message':
						$encoding = '7bit';
						break;

					case 'automatic':
						if (!$name) {
							return $this->SetError('MISSING_FILE_NAME');
						}
						$this->guessContentType($name, $content_type, $encoding);
						break;

					default:
						return $this->SetError('INVALID_CONTENT_TYPE', Array($content_type));
				}
			}
			else {
				// encoding not passed in file part, then assume, that it's binary
				$content_type = 'application/octet-stream';
			}

			$definition = Array (
				'Content-Type'				=>	$content_type,
				'Content-Transfer-Encoding'	=>	$encoding,
				'NAME'						=>	$name, // attachment name
			);

			if (isset($file['Disposition'])) {
				$disposition = strtolower($file['Disposition']);
				if ($disposition == 'inline' || $disposition == 'attachment') {
					// valid disposition header value
					$definition['DISPOSITION'] = $file['Disposition'];
				}
				else {
					return $this->SetError('INVALID_DISPOSITION', Array($file['Disposition']));
				}
			}

			if (isset($file['FileName'])) {
				$definition['FILENAME'] = $file['FileName'];
			}
			elseif (isset($file['Data'])) {
				$definition['DATA'] =& $file['Data'];
			}

			return $definition;
		}

		/**
		 * Returns content-type based on filename extension
		 *
		 * @param string $filename
		 * @param string $content_type
		 * @param string $encoding
		 *
		 * @todo Regular expression used is not completely finished, that's why if extension used for
		 * comparing in some other extension (from list) part, that partial match extension will be returned.
		 * Because of two extension that begins with same 2 letters always belong to same content type
		 * this unfinished regular expression still gives correct result in any case.
		 */
		function guessContentType($filename, &$content_type, &$encoding)
		{
			$content_type = kUtil::mimeContentTypeByExtension($filename);

			if ( mb_strtolower($this->GetFilenameExtension($filename)) == 'eml' ) {
				$encoding = '7bit';
			}
		}

		/**
		 * Using guess options combines all added parts together and returns combined part number
		 *
		 * @return int
		 */
		function PrepareMessageBody()
		{
			if ($this->bodyPartNumber === false) {
				$part_number = false; // number of generated body part

				// 1. set text content of message
				if ($this->guessOptions['text_part'] !== false && $this->guessOptions['html_part'] !== false) {
					// text & html parts present -> compose into alternative part
					$parts = Array (
						$this->guessOptions['text_part'],
						$this->guessOptions['html_part'],
					);
					$part_number = $this->CreateMultipart($parts, 'alternative');
				}
				elseif ($this->guessOptions['text_part'] !== false) {
					// only text part is defined, then leave as is
					$part_number = $this->guessOptions['text_part'];
				}

				if ($part_number === false) {
					return $this->SetError('MESSAGE_TEXT_MISSING');
				}

				// 2. if inline attachments found, then create related multipart from text & inline attachments
				if ($this->guessOptions['inline_attachments']) {
					$parts = array_merge(Array($part_number), $this->guessOptions['inline_attachments']);
					$part_number = $this->CreateMultipart($parts, 'related');
				}

				// 3. if normal attachments found, then create mixed multipart from text & attachments
				if ($this->guessOptions['attachments']) {
					$parts = array_merge(Array($part_number), $this->guessOptions['attachments']);
					$part_number = $this->CreateMultipart($parts, 'mixed');
				}

				$this->bodyPartNumber = $part_number;
			}

			return $this->bodyPartNumber;
		}

		/**
		 * Returns message headers and body part (by reference in parameters)
		 *
		 * @param Array $message_headers
		 * @param string $message_body
		 * @return bool
		 */
		function GetHeadersAndBody(&$message_headers, &$message_body)
		{
			$part_number = $this->PrepareMessageBody();
			if ($part_number === false) {
				return $this->SetError('MESSAGE_COMPOSE_ERROR');
			}

			$message_headers = $this->GetPartHeaders($part_number);

			// join message headers and body headers
			$message_headers = array_merge($this->headers, $message_headers);

			$message_headers['MIME-Version'] = '1.0';
			if ($this->mailerName) {
				$message_headers['X-Mailer'] = $this->mailerName;
			}

			$this->GenerateMessageID($message_headers['From']);
			$valid_headers = $this->ValidateHeaders($message_headers);
			if ($valid_headers) {
				// set missing headers from existing
				$from_headers = Array ('Reply-To', 'Errors-To');
				foreach ($from_headers as $header_name) {
					if (!isset($message_headers[$header_name])) {
						$message_headers[$header_name] = $message_headers['From'];
					}
				}

				$message_body = $this->GetPartBody($part_number);
				return true;
			}

			return false;
		}

		/**
		 * Checks that all required headers are set and not empty
		 *
		 * @param Array $message_headers
		 * @return bool
		 */
		function ValidateHeaders($message_headers)
		{
			$from = isset($message_headers['From']) ? $message_headers['From'] : '';
			if (!$from) {
				return $this->SetError('HEADER_MISSING', Array('From'));
			}

			if (!isset($message_headers['To'])) {
				return $this->SetError('HEADER_MISSING', Array('To'));
			}

			if (!isset($message_headers['Subject'])) {
				return $this->SetError('HEADER_MISSING', Array('Subject'));
			}

			return true;
		}

		/**
		 * Returns full message source (headers + body) for sending to SMTP server
		 *
		 * @return string
		 */
		function GetMessage()
		{
			$composed = $this->GetHeadersAndBody($message_headers, $message_body);
			if ($composed) {
				// add headers to resulting message
				$message = '';
				foreach ($message_headers as $header_name => $header_value) {
					$message .= $header_name.': '.$header_value.$this->line_break;
				}

				// add message body
				$message .= $this->line_break.$message_body;

				return $message;
			}

			return false;
		}

		/**
		 * Sets just happened error code
		 *
		 * @param string $code
		 * @param Array $params additional error params
		 * @param bool $fatal
		 * @return bool
		 */
		function SetError($code, $params = null, $fatal = true)
		{
			$error_msgs = Array (
				'MAIL_NOT_FOUND'			=>	'the mail() function is not available in this PHP installation',

				'MISSING_CONTENT_TYPE'		=>	'it was added a part without Content-Type: defined',
				'INVALID_CONTENT_TYPE'		=>	'Content-Type: %s not yet supported',
				'INVALID_MULTIPART_SUBTYPE'	=>	'multipart Content-Type sub_type %s not yet supported',
				'FILE_PART_OPEN_ERROR'		=>	'could not open part file %s',
				'FILE_PART_DATA_ERROR'		=>	'the length of the file that was read does not match the size of the part file %s due to possible data corruption',
				'FILE_PART_DATA_MISSING'	=>	'it was added a part without a body PART',
				'INVALID_ENCODING'			=>	'%s is not yet a supported encoding type',

				'MISSING_FILE_DATA'			=>	'file part data is missing',
				'MISSING_FILE_NAME'			=>	'it is not possible to determine content type from the name',
				'INVALID_DISPOSITION'		=>	'%s is not a supported message part content disposition',

				'MESSAGE_TEXT_MISSING'		=>	'text part of message was not defined',
				'MESSAGE_COMPOSE_ERROR'		=>	'unknown message composing error',

				'HEADER_MISSING'			=>	'header %s is required',

				// SMTP errors
				'INVALID_COMMAND'				=>	'Commands cannot contain newlines',
				'CONNECTION_TERMINATED'			=>	'Connection was unexpectedly closed',
				'HELO_ERROR'					=>	'HELO was not accepted: %s',
				'AUTH_METHOD_NOT_SUPPORTED'		=>	'%s is not a supported authentication method',
				'AUTH_METHOD_NOT_IMPLEMENTED'	=>	'%s is not a implemented authentication method',
			);

			if (!is_array($params)) {
				$params = Array ();
			}

			$error_msg = 'mail error: ' . vsprintf($error_msgs[$code], $params);

			if ($fatal) {
				throw new Exception($error_msg);
			}
			else {
				if ( $this->Application->isDebugMode() ) {
					$this->Application->Debugger->appendTrace();
				}

				trigger_error($error_msg, E_USER_WARNING);
			}

			return false;
		}

		/**
		 * Simple method of message sending
		 *
		 * @param string $from_email
		 * @param string $to_email
		 * @param string $subject
		 * @param string $from_name
		 * @param string $to_name
		 */
		function Send($from_email, $to_email, $subject, $from_name = '', $to_name = '')
		{
			$this->SetSubject($subject);
			$this->SetFrom($from_email, trim($from_name) ? trim($from_name) : $from_email);

			if (!isset($this->headers['Return-Path'])) {
				$this->SetReturnPath($from_email);
			}

			$this->SetTo($to_email, $to_name ? $to_name : $to_email);

			return $this->Deliver();
		}

		/**
		 * Prepares class for sending another message
		 *
		 */
		function Clear()
		{
			$this->headers = Array ();
			$this->bodyPartNumber = false;
			$this->parts = Array ();
			$this->guessOptions = Array (
				'attachments'			=>	Array (),
				'inline_attachments'	=>	Array (),
				'text_part'				=>	false,
				'html_part'				=>	false,
			);

			$this->SetCharset(null, true);
			$this->_logData = Array ();
		}

		/**
		 * Sends message via php mail function
		 *
		 * @param Array $message_headers
		 * @param string $body
		 *
		 * @return bool
		 */
		function SendMail($message_headers, &$body)
		{
			if (!function_exists('mail')) {
				return $this->SetError('MAIL_NOT_FOUND');
			}

			$to = $message_headers['To'];
			$subject = $message_headers['Subject'];
			$return_path = $message_headers['Return-Path'];
			unset($message_headers['To'], $message_headers['Subject']);

			$headers = '';
			$header_separator = $this->Application->ConfigValue('MailFunctionHeaderSeparator') == 1 ? "\n" : "\r\n";
			foreach ($message_headers as $header_name => $header_value) {
				$headers .= $header_name.': '.$header_value.$header_separator;
			}

			if ($return_path) {
				if (kUtil::constOn('SAFE_MODE') || (defined('PHP_OS') && substr(PHP_OS, 0, 3) == 'WIN')) {
					// safe mode restriction OR is windows
					$return_path = '';
				}
			}

			return mail($to, $subject, $body, $headers, $return_path ? '-f'.$return_path : null);
		}

		/**
		 * Sends message via SMTP server
		 *
		 * @param Array $message_headers
		 * @param string $message_body
		 * @return bool
		 */
		function SendSMTP($message_headers, &$message_body)
		{
			if (!$this->SmtpConnect()) {
				return false;
			}

			$from = $this->ExtractRecipientEmail($message_headers['From']);
			if (!$this->SmtpSetFrom($from)) {
				return false;
			}

			$recipients = '';
			$recipient_headers = Array ('To', 'Cc', 'Bcc');
			foreach ($recipient_headers as $recipient_header) {
				if (isset($message_headers[$recipient_header])) {
					$recipients .= ' '.$message_headers[$recipient_header];
				}
			}

			$recipients_accepted = 0;
			$recipients = $this->ExtractRecipientEmail($recipients, true);
			foreach ($recipients as $recipient) {
				if ($this->SmtpAddTo($recipient)) {
					$recipients_accepted++;
				}
			}

			if ($recipients_accepted == 0) {
				// none of recipients were accepted
				return false;
			}

			$headers = '';
			foreach ($message_headers as $header_name => $header_value) {
				$headers .= $header_name.': '.$header_value.$this->line_break;
			}

			if (!$this->SmtpSendMessage($headers . "\r\n" . $message_body)) {
				return false;
			}

			$this->SmtpDisconnect();

			return true;
		}

		/**
	     * Send a command to the server with an optional string of
	     * arguments.  A carriage return / linefeed (CRLF) sequence will
	     * be appended to each command string before it is sent to the
	     * SMTP server.
	     *
	     * @param string $command The SMTP command to send to the server.
	     * @param string $args A string of optional arguments to append to the command.
	     *
	     * @return bool
	     *
	     */
	    function SmtpSendCommand($command, $args = '')
	    {
	        if (!empty($args)) {
	            $command .= ' ' . $args;
	        }

	        if (strcspn($command, "\r\n") !== strlen($command)) {
	            return $this->SetError('INVALID_COMMAND');
	        }

	        return $this->smtpSocket->write($command . "\r\n") === false ? false : true;
	    }

	    /**
	     * Read a reply from the SMTP server. The reply consists of a response code and a response message.
	     *
	     * @param mixed $valid The set of valid response codes. These may be specified as an array of integer values or as a single integer value.
	     *
	     * @return  bool
	     *
	     */
	    function SmtpParseResponse($valid)
	    {
	        $this->smtpResponceCode = -1;
	        $this->smtpRespoceArguments = array();

	        while ($line = $this->smtpSocket->readLine()) {
	            // If we receive an empty line, the connection has been closed.
	            if (empty($line)) {
	                $this->SmtpDisconnect();
	                return $this->SetError('CONNECTION_TERMINATED', null, false);
	            }

	            // Read the code and store the rest in the arguments array.
	            $code = substr($line, 0, 3);
	            $this->smtpRespoceArguments[] = trim(substr($line, 4));

	            // Check the syntax of the response code.
	            if (is_numeric($code)) {
	                $this->smtpResponceCode = (int)$code;
	            } else {
	                $this->smtpResponceCode = -1;
	                break;
	            }

	            // If this is not a multiline response, we're done.
	            if (substr($line, 3, 1) != '-') {
	                break;
	            }
	        }

	        // Compare the server's response code with the valid code.
	        if (is_int($valid) && ($this->smtpResponceCode === $valid)) {
	            return true;
	        }

	        // If we were given an array of valid response codes, check each one.
	        if (is_array($valid)) {
	            foreach ($valid as $valid_code) {
	                if ($this->smtpResponceCode === $valid_code) {
	                    return true;
	                }
	            }
	        }

	        return false;
	    }

	    /**
	     * Attempt to connect to the SMTP server.
	     *
	     * @param int $timeout The timeout value (in seconds) for the socket connection.
	     * @param bool $persistent Should a persistent socket connection be used ?
	     *
	     * @return bool
	     *
	     */
	    function SmtpConnect($timeout = null, $persistent = false)
	    {
	        $result = $this->smtpSocket->connect($this->smtpParams['server'], $this->smtpParams['port'], $persistent, $timeout);
	        if (!$result) {
	        	return false;
	        }

	        if ($this->SmtpParseResponse(220) === false) {
	        	return false;
	        }
	        elseif ($this->SmtpNegotiate() === false) {
	        	return false;
	        }

	        if ($this->smtpParams['use_auth']) {
	        	$result = $this->SmtpAuthentificate($this->smtpParams['username'], $this->smtpParams['password']);
	        	if (!$result) {
	        		// authentification failed
	        		return false;
	        	}
	        }

	        return true;
	    }

	    /**
	     * Attempt to disconnect from the SMTP server.
	     *
	     * @return bool
	     */
	    function SmtpDisconnect()
	    {
	        if ($this->SmtpSendCommand('QUIT') === false) {
	        	return false;
	        }
	        elseif ($this->SmtpParseResponse(221) === false) {
	        	return false;
	        }

	        return $this->smtpSocket->disconnect();
	    }

	    /**
	     * Attempt to send the EHLO command and obtain a list of ESMTP
	     * extensions available, and failing that just send HELO.
	     *
	     * @return bool
	     */
	    function SmtpNegotiate()
	    {
	        if (!$this->SmtpSendCommand('EHLO', $this->smtpParams['localhost'])) {
	        	return false;
	        }

	        if (!$this->SmtpParseResponse(250)) {
	            // If we receive a 503 response, we're already authenticated.
	            if ($this->smtpResponceCode === 503) {
	                return true;
	            }

	            // If the EHLO failed, try the simpler HELO command.
	            if (!$this->SmtpSendCommand('HELO', $this->smtpParams['localhost'])) {
	            	return false;
	            }

	            if (!$this->SmtpParseResponse(250)) {
	                return $this->SetError('HELO_ERROR', Array($this->smtpResponceCode), false);
	            }

	            return true;
	        }

	        foreach ($this->smtpRespoceArguments as $argument) {
	            $verb = strtok($argument, ' ');
	            $arguments = substr($argument, strlen($verb) + 1, strlen($argument) - strlen($verb) - 1);
	            $this->smtpFeatures[$verb] = $arguments;
	        }

	        return true;
	    }

	    /**
	     * Attempt to do SMTP authentication.
	     *
	     * @param string $uid The userid to authenticate as.
	     * @param string $pwd The password to authenticate with.
	     * @param string $method The requested authentication method.  If none is specified, the best supported method will be used.
	     *
	     * @return bool
	     */
	    function SmtpAuthentificate($uid, $pwd , $method = '')
	    {
	        if (empty($this->smtpFeatures['AUTH'])) {
	        	// server doesn't understand AUTH command, then don't authentificate
	            return true;
	        }

	        $available_methods = explode(' ', $this->smtpFeatures['AUTH']); // methods supported by SMTP server

	        if (empty($method)) {
		        foreach ($this->smtpAuthMethods as $supported_method) {
		        	// check if server supports methods, that we have implemented
		            if (in_array($supported_method, $available_methods)) {
		            	$method = $supported_method;
		                break;
		            }
		        }
	        } else {
	            $method = strtoupper($method);
	        }

	        if (!in_array($method, $available_methods)) {
	        	// coosen method  is not supported by server
	        	return $this->SetError('AUTH_METHOD_NOT_SUPPORTED', Array($method));
	        }

	        switch ($method) {
	        	case 'CRAM-MD5':
	                $result = $this->_authCRAM_MD5($uid, $pwd);
	                break;

	            case 'LOGIN':
	                $result = $this->_authLogin($uid, $pwd);
	                break;
	            case 'PLAIN':
	                $result = $this->_authPlain($uid, $pwd);
	                break;
	            default:
					return $this->SetError('AUTH_METHOD_NOT_IMPLEMENTED', Array($method));
	                break;
	        }

			return $result;
	    }

	    /**
	    * Function which implements HMAC MD5 digest
	    *
	    * @param  string $key  The secret key
	    * @param  string $data The data to protect
	    * @return string       The HMAC MD5 digest
	    */
	    function _HMAC_MD5($key, $data)
	    {
	        if (strlen($key) > 64) {
	            $key = pack('H32', md5($key));
	        }

	        if (strlen($key) < 64) {
	            $key = str_pad($key, 64, chr(0));
	        }

	        $k_ipad = substr($key, 0, 64) ^ str_repeat(chr(0x36), 64);
	        $k_opad = substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64);

	        $inner  = pack('H32', md5($k_ipad . $data));
	        $digest = md5($k_opad . $inner);

	        return $digest;
	    }

	    /**
	     * Authenticates the user using the CRAM-MD5 method.
	     *
	     * @param string $uid The userid to authenticate as.
	     * @param string $pwd The password to authenticate with.
	     *
	     * @return bool
	     */
	    function _authCRAM_MD5($uid, $pwd)
	    {
	        if (!$this->SmtpSendCommand('AUTH', 'CRAM-MD5')) {
	            return false;
	        }

	        // 334: Continue authentication request
	        if (!$this->SmtpParseResponse(334)) {
	            // 503: Error: already authenticated
	            return $this->smtpResponceCode === 503 ? true : false;
	        }

	        $challenge = base64_decode($this->smtpRespoceArguments[0]);
	        $auth_str = base64_encode($uid . ' ' . $this->_HMAC_MD5($pwd, $challenge));

	        if (!$this->SmtpSendCommand($auth_str)) {
	            return false;
	        }

	        // 235: Authentication successful
	        if (!$this->SmtpParseResponse(235)) {
	            return false;
	        }

	        return true;
	    }

	    /**
	     * Authenticates the user using the LOGIN method.
	     *
	     * @param string $uid The userid to authenticate as.
	     * @param string $pwd The password to authenticate with.
	     *
	     * @return bool
	     */
	    function _authLogin($uid, $pwd)
	    {
	        if (!$this->SmtpSendCommand('AUTH', 'LOGIN')) {
	            return false;
	        }

	        // 334: Continue authentication request
	        if (!$this->SmtpParseResponse(334)) {
	            // 503: Error: already authenticated
	            return $this->smtpResponceCode === 503 ? true : false;
	        }

	        if (!$this->SmtpSendCommand(base64_encode($uid))) {
	            return false;
	        }

	        // 334: Continue authentication request
	        if (!$this->SmtpParseResponse(334)) {
	            return false;
	        }

	        if (!$this->SmtpSendCommand(base64_encode($pwd))) {
	            return false;
	        }

	        // 235: Authentication successful
	        if (!$this->SmtpParseResponse(235)) {
	            return false;
	        }

	        return true;
	    }

	    /**
	     * Authenticates the user using the PLAIN method.
	     *
	     * @param string $uid The userid to authenticate as.
	     * @param string $pwd The password to authenticate with.
	     *
	     * @return bool
	     */
	    function _authPlain($uid, $pwd)
	    {
	        if (!$this->SmtpSendCommand('AUTH', 'PLAIN')) {
	            return false;
	        }

	        // 334: Continue authentication request
	        if (!$this->SmtpParseResponse(334)) {
	            // 503: Error: already authenticated
				return $this->smtpResponceCode === 503 ? true : false;
	        }

	        $auth_str = base64_encode(chr(0) . $uid . chr(0) . $pwd);

	        if (!$this->SmtpSendCommand($auth_str)) {
	            return false;
	        }

	        // 235: Authentication successful
	        if (!$this->SmtpParseResponse(235)) {
	            return false;
	        }

	        return true;
	    }

	    /**
	     * Send the MAIL FROM: command.
	     *
	     * @param string $sender The sender (reverse path) to set.
	     * @param string $params String containing additional MAIL parameters, such as the NOTIFY flags defined by RFC 1891 or the VERP protocol.
	     *
	     * @return bool
	     */
	    function SmtpSetFrom($sender, $params = null)
	    {
	        $args = "FROM:<$sender>";
	        if (is_string($params)) {
	            $args .= ' ' . $params;
	        }

	        if (!$this->SmtpSendCommand('MAIL', $args)) {
	            return false;
	        }
	        if (!$this->SmtpParseResponse(250)) {
	            return false;
	        }

	        return true;
	    }

	    /**
	     * Send the RCPT TO: command.
	     *
	     * @param string $recipient The recipient (forward path) to add.
	     * @param string $params String containing additional RCPT parameters, such as the NOTIFY flags defined by RFC 1891.
	     *
	     * @return bool
	     */
	    function SmtpAddTo($recipient, $params = null)
	    {
	        $args = "TO:<$recipient>";
	        if (is_string($params)) {
	            $args .= ' ' . $params;
	        }

	        if (!$this->SmtpSendCommand('RCPT', $args)) {
	            return false;
	        }

	        if (!$this->SmtpParseResponse(array(250, 251))) {
	            return false;
	        }

	        return true;
	    }

	    /**
	     * Send the DATA command.
	     *
	     * @param string $data The message body to send.
	     *
	     * @return bool
	     */
	    function SmtpSendMessage($data)
	    {
	        /* RFC 1870, section 3, subsection 3 states "a value of zero
	         * indicates that no fixed maximum message size is in force".
	         * Furthermore, it says that if "the parameter is omitted no
	         * information is conveyed about the server's fixed maximum
	         * message size". */
	        if (isset($this->smtpFeatures['SIZE']) && ($this->smtpFeatures['SIZE'] > 0)) {
	            if (strlen($data) >= $this->smtpFeatures['SIZE']) {
	                $this->SmtpDisconnect();
	                return $this->SetError('Message size excedes the server limit', null, false);
	            }
	        }

	        // Quote the data based on the SMTP standards

	        // Change Unix (\n) and Mac (\r) linefeeds into Internet-standard CRLF (\r\n) linefeeds.
	        $data = preg_replace(Array('/(?<!\r)\n/','/\r(?!\n)/'), "\r\n", $data);

	        // Because a single leading period (.) signifies an end to the data,
	        // legitimate leading periods need to be "doubled" (e.g. '..')
	        $data = str_replace("\n.", "\n..", $data);

	        if (!$this->SmtpSendCommand('DATA')) {
	            return false;
	        }
	        if (!$this->SmtpParseResponse(354)) {
	            return false;
	        }

	        if ($this->smtpSocket->write($data . "\r\n.\r\n") === false) {
	            return false;
	        }
	        if (!$this->SmtpParseResponse(250)) {
	            return false;
	        }

	        return true;
	    }

		/**
		 * Sets global charset for every message part
		 *
		 * @param string $charset
		 * @param bool $is_system set charset to default for current language
		 */
		function SetCharset($charset, $is_system = false)
		{
			if ( $is_system ) {
				$language = $this->Application->recallObject('lang.current');
				/* @var $language LanguagesItem */

				$charset = $language->GetDBField('Charset') ? $language->GetDBField('Charset') : 'ISO-8859-1';
			}

			$this->charset = $charset;
		}

		/**
		 * Allows to extract recipient's name from text by specifying it's email
		 *
		 * @param string $text
		 * @param string $email
		 * @return string
		 */
		function ExtractRecipientName($text, $email = '')
		{
			$lastspace = mb_strrpos($text, ' ');
			$name = trim(mb_substr($text, 0, $lastspace - mb_strlen($text)), " \r\n\t\0\x0b\"'");
			if (empty($name)) {
				$name = $email;
			}
			return $name;
		}

		/**
		 * Takes $text and returns an email address from it
		 * Set $multiple to true to retrieve all found addresses
		 * Returns false if no addresses were found
		 *
		 * @param string $text
		 * @param bool $multiple
		 * @param bool $allow_only_domain
		 * @return Array|bool
		 * @access public
		 */
		public function ExtractRecipientEmail($text, $multiple = false, $allow_only_domain = false)
		{
			if ( $allow_only_domain ) {
				$pattern = '/((' . REGEX_EMAIL_USER . '@)?' . REGEX_EMAIL_DOMAIN . ')/i';
			}
			else {
				$pattern = '/(' . REGEX_EMAIL_USER . '@' . REGEX_EMAIL_DOMAIN . ')/i';
			}
			if ( $multiple ) {
				if ( preg_match_all($pattern, $text, $found_emails) >= 1 ) {
					return $found_emails[1];
				}
				else {
					return false;
				}
			}
			else {
				if ( preg_match($pattern, $text, $found_emails) == 1 ) {
					return $found_emails[1];
				}
				else {
					return false;
				}
			}
		}

		/**
		 * Returns array of recipient names and emails
		 *
		 * @param string $list
		 * @param string $separator
		 * @return Array
		 */
		function GetRecipients($list, $separator = ';')
		{
			// by MIME specs recipients should be separated using "," symbol,
			// but users can write ";" too (like in OutLook)

			if (!trim($list)) {
				return false;
			}

			$list = explode(',', str_replace($separator, ',', $list));

			$ret = Array ();
			foreach ($list as $recipient) {
				$email = $this->ExtractRecipientEmail($recipient);
				if (!$email) {
					// invalid email format -> error
					return false;
				}
				$name = $this->ExtractRecipientName($recipient, $email);
				$ret[] = Array('Name' => $name, 'Email' => $email);
			}

			return $ret;
		}

		/* methods for nice header setting */

		/**
		 * Sets "From" header.
		 *
		 * @param string $email
		 * @param string $first_last_name FirstName and LastName or just FirstName
		 * @param string $last_name LastName (if not specified in previous parameter)
		 */
		function SetFrom($email, $first_last_name, $last_name = '')
		{
			$name = rtrim($first_last_name.' '.$last_name, ' ');
			$this->SetEncodedEmailHeader('From', $email, $name ? $name : $email);

			if (!isset($this->headers['Return-Path'])) {
				$this->SetReturnPath($email);
			}
		}

		/**
		 * Sets "To" header.
		 *
		 * @param string $email
		 * @param string $first_last_name FirstName and LastName or just FirstName
		 * @param string $last_name LastName (if not specified in previous parameter)
		 */
		function SetTo($email, $first_last_name, $last_name = '')
		{
			$name = rtrim($first_last_name.' '.$last_name, ' ');
			$email = $this->_replaceRecipientEmail($email);

			$this->SetEncodedEmailHeader('To', $email, $name ? $name : $email);
		}

		/**
		 * Sets "Return-Path" header (useful for spammers)
		 *
		 * @param string $email
		 */
		function SetReturnPath($email)
		{
			$this->SetHeader('Return-Path', $email);
		}

		/**
		 * Adds one more recipient into "To" header
		 *
		 * @param string $email
		 * @param string $first_last_name FirstName and LastName or just FirstName
		 * @param string $last_name LastName (if not specified in previous parameter)
		 */
		function AddTo($email, $first_last_name = '', $last_name = '')
		{
			$name = rtrim($first_last_name.' '.$last_name, ' ');
			$this->AddRecipient('To', $email, $name);
		}

		/**
		 * Allows to replace recipient in all sent emails (used for debugging)
		 *
		 * @param string $email
		 * @return string
		 */
		function _replaceRecipientEmail($email)
		{
			if ( defined('OVERRIDE_EMAIL_RECIPIENTS') && OVERRIDE_EMAIL_RECIPIENTS ) {
				if ( substr(OVERRIDE_EMAIL_RECIPIENTS, 0, 1) == '@' ) {
					// domain
					$email = str_replace('@', '_at_', $email) . OVERRIDE_EMAIL_RECIPIENTS;
				}
				else {
					$email = OVERRIDE_EMAIL_RECIPIENTS;
				}
			}

			return $email;
		}

		/**
		 * Adds one more recipient into "Cc" header
		 *
		 * @param string $email
		 * @param string $first_last_name FirstName and LastName or just FirstName
		 * @param string $last_name LastName (if not specified in previous parameter)
		 */
		function AddCc($email, $first_last_name = '', $last_name = '')
		{
			$name = rtrim($first_last_name.' '.$last_name, ' ');
			$this->AddRecipient('Cc', $email, $name);
		}

		/**
		 * Adds one more recipient into "Bcc" header
		 *
		 * @param string $email
		 * @param string $first_last_name FirstName and LastName or just FirstName
		 * @param string $last_name LastName (if not specified in previous parameter)
		 */
		function AddBcc($email, $first_last_name = '', $last_name = '')
		{
			$name = rtrim($first_last_name.' '.$last_name, ' ');
			$this->AddRecipient('Bcc', $email, $name);
		}

		/**
		 * Adds one more recipient to specified header
		 *
		 * @param string $header_name
		 * @param string $email
		 * @param string $name
		 */
		function AddRecipient($header_name, $email, $name = '')
		{
			$email = $this->_replaceRecipientEmail($email);

			if (!$name) {
				$name = $email;
			}

			$value = isset($this->headers[$header_name]) ? $this->headers[$header_name] : '';
			$value .= ', ' . $this->QuotedPrintableEncode($name, $this->charset) . ' <' . $email . '>';

			$this->SetHeader($header_name, substr($value, 2));
		}

		/**
		 * Sets "Subject" header.
		 *
		 * @param string $subject message subject
		 */
		function SetSubject($subject)
		{
			$this->setEncodedHeader('Subject', $subject);
		}

		/**
		 * Sets HTML part of message
		 *
		 * @param string $html
		 */
		function SetHTML($html)
		{
			$this->CreateTextHtmlPart($html, true);
		}

		/**
		 * Sets Plain-Text part of message
		 *
		 * @param string $plain_text
		 */
		function SetPlain($plain_text)
		{
			$this->CreateTextHtmlPart($plain_text);
		}

		/**
		 * Sets HTML and optionally plain part of the message
		 *
		 * @param string $html
		 * @param string $plain_text
		 */
		function SetBody($html, $plain_text = '')
		{
			$this->SetHTML($html);
			if ($plain_text) {
				$this->SetPlain($plain_text);
			}
		}

		/**
		 * Performs mail delivery (supports delayed delivery)
		 *
		 * @param string $message message, if not given, then use composed one
		 * @param bool $immediate_send send message now or MailingId
		 * @param bool $immediate_clear clear message parts after message is sent
		 * @return bool
		 */
		function Deliver($message = null, $immediate_send = true, $immediate_clear = true)
		{
			if (isset($message)) {
				// if message is given directly, then use it
				if (is_array($message)) {
					$message_headers =& $message[0];
					$message_body =& $message[1];
				}
				else {
					$message_headers = Array ();
					list ($headers, $message_body) = explode("\n\n", $message, 2);
					$headers = explode("\n", $headers);
					foreach ($headers as $header) {
						$header = explode(':', $header, 2);
						$message_headers[ trim($header[0]) ] = trim($header[1]);
					}
				}
				$composed = true;
			} else {
				// direct message not given, then assemble message from available parts
				$composed = $this->GetHeadersAndBody($message_headers, $message_body);
			}

			if ( $composed ) {
				if ( $immediate_send === true ) {
					$send_method = 'Send' . $this->sendMethod;
					$result = $this->$send_method($message_headers, $message_body);

					if ( $result && $this->_logData ) {
						// add e-mail log record
						$this->Conn->doInsert($this->_logData, TABLE_PREFIX . 'EmailLog');
					}

					if ( $immediate_clear ) {
						$this->Clear();
					}

					return $result;
				}
				else {
					$fields_hash = Array (
						'ToEmail' => $message_headers['To'],
						'Subject' => $message_headers['Subject'],
						'Queued' => adodb_mktime(),
						'SendRetries' => 0,
						'LastSendRetry' => 0,
						'MailingId' => (int)$immediate_send,
						'LogData' => serialize($this->_logData), // remember e-mail log record
					);

					$fields_hash['MessageHeaders'] = serialize($message_headers);
					$fields_hash['MessageBody'] =& $message_body;
					$this->Conn->doInsert($fields_hash, TABLE_PREFIX . 'EmailQueue');

					if ( $immediate_clear ) {
						$this->Clear();
					}
				}
			}

			// if not immediate send, then send result is positive :)
			return $immediate_send !== true ? true : false;
		}

		/**
		 * Sets log data
		 *
		 * @param string $log_data
		 * @return void
		 * @access public
		 */
		public function setLogData($log_data)
		{
			$this->_logData = $log_data;
		}
	}