ci-bonfire / Sprint

system/libraries/Email.php

<?php

For compatibility and reusability of your code, PSR1 recommends that a file should introduce either new symbols (like classes, functions, etc.) or have side-effects (like outputting something, or including other files), but not both at the same time. The first symbol is defined on line 51 and the first side effect is on line 38.

/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2015, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package	CodeIgniter
 * @author	EllisLab Dev Team
 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
 * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
 * @license	http://opensource.org/licenses/MIT	MIT License
 * @link	http://codeigniter.com
 * @since	Version 1.0.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * CodeIgniter Email Class
 *
 * Permits email to be sent using Mail, Sendmail, or SMTP.
 *
 * @package		CodeIgniter
 * @subpackage	Libraries
 * @category	Libraries
 * @author		EllisLab Dev Team
 * @link		http://codeigniter.com/user_guide/libraries/email.html
 */
class CI_Email {

	/**
	 * Used as the User-Agent and X-Mailer headers' value.
	 *
	 * @var	string
	 */
	public $useragent	= 'CodeIgniter';

	/**
	 * Path to the Sendmail binary.
	 *
	 * @var	string
	 */
	public $mailpath	= '/usr/sbin/sendmail';	// Sendmail path

	/**
	 * Which method to use for sending e-mails.
	 *
	 * @var	string	'mail', 'sendmail' or 'smtp'
	 */
	public $protocol	= 'mail';		// mail/sendmail/smtp

	/**
	 * STMP Server host
	 *
	 * @var	string
	 */
	public $smtp_host	= '';

	/**
	 * SMTP Username
	 *
	 * @var	string
	 */
	public $smtp_user	= '';

	/**
	 * SMTP Password
	 *
	 * @var	string
	 */
	public $smtp_pass	= '';

	/**
	 * SMTP Server port
	 *
	 * @var	int
	 */
	public $smtp_port	= 25;

	/**
	 * SMTP connection timeout in seconds
	 *
	 * @var	int
	 */
	public $smtp_timeout	= 5;

	/**
	 * SMTP persistent connection
	 *
	 * @var	bool
	 */
	public $smtp_keepalive	= FALSE;

	/**
	 * SMTP Encryption
	 *
	 * @var	string	empty, 'tls' or 'ssl'
	 */
	public $smtp_crypto	= '';

	/**
	 * Whether to apply word-wrapping to the message body.
	 *
	 * @var	bool
	 */
	public $wordwrap	= TRUE;

	/**
	 * Number of characters to wrap at.
	 *
	 * @see	CI_Email::$wordwrap
	 * @var	int
	 */
	public $wrapchars	= 76;

	/**
	 * Message format.
	 *
	 * @var	string	'text' or 'html'
	 */
	public $mailtype	= 'text';

	/**
	 * Character set (default: utf-8)
	 *
	 * @var	string
	 */
	public $charset		= 'utf-8';

	/**
	 * Multipart message
	 *
	 * @var	string	'mixed' (in the body) or 'related' (separate)
	 */
	public $multipart	= 'mixed';		// "mixed" (in the body) or "related" (separate)

39% of this comment could be valid code. Did you maybe forget this after debugging?

	/**
	 * Alternative message (for HTML messages only)
	 *
	 * @var	string
	 */
	public $alt_message	= '';

	/**
	 * Whether to validate e-mail addresses.
	 *
	 * @var	bool
	 */
	public $validate	= FALSE;

	/**
	 * X-Priority header value.
	 *
	 * @var	int	1-5
	 */
	public $priority	= 3;			// Default priority (1 - 5)

42% of this comment could be valid code. Did you maybe forget this after debugging?

	/**
	 * Newline character sequence.
	 * Use "\r\n" to comply with RFC 822.
	 *
	 * @link	http://www.ietf.org/rfc/rfc822.txt
	 * @var	string	"\r\n" or "\n"
	 */
	public $newline		= "\n";			// Default newline. "\r\n" or "\n" (Use "\r\n" to comply with RFC 822)

	/**
	 * CRLF character sequence
	 *
	 * RFC 2045 specifies that for 'quoted-printable' encoding,
	 * "\r\n" must be used. However, it appears that some servers
	 * (even on the receiving end) don't handle it properly and
	 * switching to "\n", while improper, is the only solution
	 * that seems to work for all environments.
	 *
	 * @link	http://www.ietf.org/rfc/rfc822.txt
	 * @var	string
	 */
	public $crlf		= "\n";

	/**
	 * Whether to use Delivery Status Notification.
	 *
	 * @var	bool
	 */
	public $dsn		= FALSE;

	/**
	 * Whether to send multipart alternatives.
	 * Yahoo! doesn't seem to like these.
	 *
	 * @var	bool
	 */
	public $send_multipart	= TRUE;

	/**
	 * Whether to send messages to BCC recipients in batches.
	 *
	 * @var	bool
	 */
	public $bcc_batch_mode	= FALSE;

	/**
	 * BCC Batch max number size.
	 *
	 * @see	CI_Email::$bcc_batch_mode
	 * @var	int
	 */
	public $bcc_batch_size	= 200;

	// --------------------------------------------------------------------

	/**
	 * Whether PHP is running in safe mode. Initialized by the class constructor.
	 *
	 * @var	bool
	 */
	protected $_safe_mode		= FALSE;

	/**
	 * Subject header
	 *
	 * @var	string
	 */
	protected $_subject		= '';

	/**
	 * Message body
	 *
	 * @var	string
	 */
	protected $_body		= '';

	/**
	 * Final message body to be sent.
	 *
	 * @var	string
	 */
	protected $_finalbody		= '';

	/**
	 * multipart/alternative boundary
	 *
	 * @var	string
	 */
	protected $_alt_boundary	= '';

	/**
	 * Attachment boundary
	 *
	 * @var	string
	 */
	protected $_atc_boundary	= '';

	/**
	 * Final headers to send
	 *
	 * @var	string
	 */
	protected $_header_str		= '';

	/**
	 * SMTP Connection socket placeholder
	 *
	 * @var	resource
	 */
	protected $_smtp_connect	= '';

	/**
	 * Mail encoding
	 *
	 * @var	string	'8bit' or '7bit'
	 */
	protected $_encoding		= '8bit';

	/**
	 * Whether to perform SMTP authentication
	 *
	 * @var	bool
	 */
	protected $_smtp_auth		= FALSE;

	/**
	 * Whether to send a Reply-To header
	 *
	 * @var	bool
	 */
	protected $_replyto_flag	= FALSE;

	/**
	 * Debug messages
	 *
	 * @see	CI_Email::print_debugger()
	 * @var	string
	 */
	protected $_debug_msg		= array();

	/**
	 * Recipients
	 *
	 * @var	string[]
	 */
	protected $_recipients		= array();

	/**
	 * CC Recipients
	 *
	 * @var	string[]
	 */
	protected $_cc_array		= array();

	/**
	 * BCC Recipients
	 *
	 * @var	string[]
	 */
	protected $_bcc_array		= array();

	/**
	 * Message headers
	 *
	 * @var	string[]
	 */
	protected $_headers		= array();

	/**
	 * Attachment data
	 *
	 * @var	array
	 */
	protected $_attachments		= array();

	/**
	 * Valid $protocol values
	 *
	 * @see	CI_Email::$protocol
	 * @var	string[]
	 */
	protected $_protocols		= array('mail', 'sendmail', 'smtp');

	/**
	 * Base charsets
	 *
	 * Character sets valid for 7-bit encoding,
	 * excluding language suffix.
	 *
	 * @var	string[]
	 */
	protected $_base_charsets	= array('us-ascii', 'iso-2022-');

	/**
	 * Bit depths
	 *
	 * Valid mail encodings
	 *
	 * @see	CI_Email::$_encoding
	 * @var	string[]
	 */
	protected $_bit_depths		= array('7bit', '8bit');

	/**
	 * $priority translations
	 *
	 * Actual values to send with the X-Priority header
	 *
	 * @var	string[]
	 */
	protected $_priorities = array(
		1 => '1 (Highest)',
		2 => '2 (High)',
		3 => '3 (Normal)',
		4 => '4 (Low)',
		5 => '5 (Lowest)'
	);

	// --------------------------------------------------------------------

	/**
	 * Constructor - Sets Email Preferences
	 *
	 * The constructor can be passed an array of config values
	 *
	 * @param	array	$config = array()
	 * @return	void
	 */
	public function __construct(array $config = array())
	{
		$this->charset = config_item('charset');

		if (count($config) > 0)
		{
			$this->initialize($config);
		}
		else
		{
			$this->_smtp_auth = ! ($this->smtp_user === '' && $this->smtp_pass === '');
		}

		$this->_safe_mode = ( ! is_php('5.4') && ini_get('safe_mode'));
		$this->charset = strtoupper($this->charset);

		log_message('info', 'Email Class Initialized');
	}

	// --------------------------------------------------------------------

	/**
	 * Destructor - Releases Resources
	 *
	 * @return	void
	 */
	public function __destruct()
	{
		if (is_resource($this->_smtp_connect))
		{
			$this->_send_command('quit');
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Initialize preferences
	 *
	 * @param	array
	 * @return	CI_Email
	 */
	public function initialize($config = array())
	{
		foreach ($config as $key => $val)
		{
			if (isset($this->$key))
			{
				$method = 'set_'.$key;

				if (method_exists($this, $method))
				{
					$this->$method($val);
				}
				else
				{
					$this->$key = $val;
				}
			}
		}
		$this->clear();

		$this->_smtp_auth = ! ($this->smtp_user === '' && $this->smtp_pass === '');

		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Initialize the Email Data
	 *
	 * @param	bool
	 * @return	CI_Email
	 */
	public function clear($clear_attachments = FALSE)
	{
		$this->_subject		= '';
		$this->_body		= '';
		$this->_finalbody	= '';
		$this->_header_str	= '';
		$this->_replyto_flag	= FALSE;
		$this->_recipients	= array();
		$this->_cc_array	= array();
		$this->_bcc_array	= array();
		$this->_headers		= array();
		$this->_debug_msg	= array();

		$this->set_header('User-Agent', $this->useragent);
		$this->set_header('Date', $this->_set_date());

		if ($clear_attachments !== FALSE)
		{
			$this->_attachments = array();
		}

		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set FROM
	 *
	 * @param	string	$from
	 * @param	string	$name
	 * @param	string	$return_path = NULL	Return-Path
	 * @return	CI_Email
	 */
	public function from($from, $name = '', $return_path = NULL)
	{
		if (preg_match('/\<(.*)\>/', $from, $match))
		{
			$from = $match[1];
		}

		if ($this->validate)
		{
			$this->validate_email($this->_str_to_array($from));
			if ($return_path)
			{
				$this->validate_email($this->_str_to_array($return_path));
			}
		}

		// prepare the display name
		if ($name !== '')
		{
			// only use Q encoding if there are characters that would require it
			if ( ! preg_match('/[\200-\377]/', $name))
			{
				// add slashes for non-printing characters, slashes, and double quotes, and surround it in double quotes
				$name = '"'.addcslashes($name, "\0..\37\177'\"\\").'"';
			}
			else
			{
				$name = $this->_prep_q_encoding($name);
			}
		}

		$this->set_header('From', $name.' <'.$from.'>');

		isset($return_path) OR $return_path = $from;
		$this->set_header('Return-Path', '<'.$return_path.'>');

		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set Reply-to
	 *
	 * @param	string
	 * @param	string
	 * @return	CI_Email
	 */
	public function reply_to($replyto, $name = '')
	{
		if (preg_match('/\<(.*)\>/', $replyto, $match))
		{
			$replyto = $match[1];
		}

		if ($this->validate)
		{
			$this->validate_email($this->_str_to_array($replyto));
		}

		if ($name === '')
		{
			$name = $replyto;
		}

		if (strpos($name, '"') !== 0)
		{
			$name = '"'.$name.'"';
		}

		$this->set_header('Reply-To', $name.' <'.$replyto.'>');
		$this->_replyto_flag = TRUE;

		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set Recipients
	 *
	 * @param	string
	 * @return	CI_Email
	 */
	public function to($to)
	{
		$to = $this->_str_to_array($to);
		$to = $this->clean_email($to);

		if ($this->validate)
		{
			$this->validate_email($to);
		}

		if ($this->_get_protocol() !== 'mail')
		{
			$this->set_header('To', implode(', ', $to));
		}

		$this->_recipients = $to;

		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set CC
	 *
	 * @param	string
	 * @return	CI_Email
	 */
	public function cc($cc)
	{
		$cc = $this->clean_email($this->_str_to_array($cc));

		if ($this->validate)
		{
			$this->validate_email($cc);
		}

		$this->set_header('Cc', implode(', ', $cc));

		if ($this->_get_protocol() === 'smtp')
		{
			$this->_cc_array = $cc;
		}

		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set BCC
	 *
	 * @param	string
	 * @param	string
	 * @return	CI_Email
	 */
	public function bcc($bcc, $limit = '')
	{
		if ($limit !== '' && is_numeric($limit))
		{
			$this->bcc_batch_mode = TRUE;
			$this->bcc_batch_size = $limit;
		}

		$bcc = $this->clean_email($this->_str_to_array($bcc));

		if ($this->validate)
		{
			$this->validate_email($bcc);
		}

		if ($this->_get_protocol() === 'smtp' OR ($this->bcc_batch_mode && count($bcc) > $this->bcc_batch_size))
		{
			$this->_bcc_array = $bcc;
		}
		else
		{
			$this->set_header('Bcc', implode(', ', $bcc));
		}

		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set Email Subject
	 *
	 * @param	string
	 * @return	CI_Email
	 */
	public function subject($subject)
	{
		$subject = $this->_prep_q_encoding($subject);
		$this->set_header('Subject', $subject);
		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set Body
	 *
	 * @param	string
	 * @return	CI_Email
	 */
	public function message($body)
	{
		$this->_body = rtrim(str_replace("\r", '', $body));

		/* strip slashes only if magic quotes is ON
		   if we do it with magic quotes OFF, it strips real, user-inputted chars.

		   NOTE: In PHP 5.4 get_magic_quotes_gpc() will always return 0 and
			 it will probably not exist in future versions at all.
		*/
		if ( ! is_php('5.4') && get_magic_quotes_gpc())
		{
			$this->_body = stripslashes($this->_body);
		}

		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Assign file attachments
	 *
	 * @param	string	$file	Can be local path, URL or buffered content
	 * @param	string	$disposition = 'attachment'
	 * @param	string	$newname = NULL
	 * @param	string	$mime = ''
	 * @return	CI_Email
	 */
	public function attach($file, $disposition = '', $newname = NULL, $mime = '')
	{
		if ($mime === '')
		{
			if (strpos($file, '://') === FALSE && ! file_exists($file))
			{
				$this->_set_error_message('lang:email_attachment_missing', $file);
				return FALSE;
			}

			if ( ! $fp = @fopen($file, 'rb'))
			{
				$this->_set_error_message('lang:email_attachment_unreadable', $file);
				return FALSE;
			}

			$file_content = stream_get_contents($fp);
			$mime = $this->_mime_types(pathinfo($file, PATHINFO_EXTENSION));
			fclose($fp);
		}
		else
		{
			$file_content =& $file; // buffered file
		}

		$this->_attachments[] = array(
			'name'		=> array($file, $newname),
			'disposition'	=> empty($disposition) ? 'attachment' : $disposition,  // Can also be 'inline'  Not sure if it matters
			'type'		=> $mime,
			'content'	=> chunk_split(base64_encode($file_content))
		);

		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set and return attachment Content-ID
	 *
	 * Useful for attached inline pictures
	 *
	 * @param	string	$filename
	 * @return	string
	 */
	public function attachment_cid($filename)
	{
		if ($this->multipart !== 'related')
		{
			$this->multipart = 'related'; // Thunderbird need this for inline images
		}

		for ($i = 0, $c = count($this->_attachments); $i < $c; $i++)
		{
			if ($this->_attachments[$i]['name'][0] === $filename)
			{
				$this->_attachments[$i]['cid'] = uniqid(basename($this->_attachments[$i]['name'][0]).'@');
				return $this->_attachments[$i]['cid'];
			}
		}

		return FALSE;
	}

	// --------------------------------------------------------------------

	/**
	 * Add a Header Item
	 *
	 * @param	string
	 * @param	string
	 * @return	CI_Email
	 */
	public function set_header($header, $value)
	{
		$this->_headers[$header] = str_replace(array("\n", "\r"), '', $value);
		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Convert a String to an Array
	 *
	 * @param	string
	 * @return	array
	 */
	protected function _str_to_array($email)
	{
		if ( ! is_array($email))
		{
			return (strpos($email, ',') !== FALSE)
				? preg_split('/[\s,]/', $email, -1, PREG_SPLIT_NO_EMPTY)
				: (array) trim($email);
		}

		return $email;
	}

	// --------------------------------------------------------------------

	/**
	 * Set Multipart Value
	 *
	 * @param	string
	 * @return	CI_Email
	 */
	public function set_alt_message($str)
	{
		$this->alt_message = (string) $str;
		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set Mailtype
	 *
	 * @param	string
	 * @return	CI_Email
	 */
	public function set_mailtype($type = 'text')
	{
		$this->mailtype = ($type === 'html') ? 'html' : 'text';
		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set Wordwrap
	 *
	 * @param	bool
	 * @return	CI_Email
	 */
	public function set_wordwrap($wordwrap = TRUE)
	{
		$this->wordwrap = (bool) $wordwrap;
		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set Protocol
	 *
	 * @param	string
	 * @return	CI_Email
	 */
	public function set_protocol($protocol = 'mail')
	{
		$this->protocol = in_array($protocol, $this->_protocols, TRUE) ? strtolower($protocol) : 'mail';
		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set Priority
	 *
	 * @param	int
	 * @return	CI_Email
	 */
	public function set_priority($n = 3)
	{
		$this->priority = preg_match('/^[1-5]$/', $n) ? (int) $n : 3;
		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set Newline Character
	 *
	 * @param	string
	 * @return	CI_Email
	 */
	public function set_newline($newline = "\n")
	{
		$this->newline = in_array($newline, array("\n", "\r\n", "\r")) ? $newline : "\n";
		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set CRLF
	 *
	 * @param	string
	 * @return	CI_Email
	 */
	public function set_crlf($crlf = "\n")
	{
		$this->crlf = ($crlf !== "\n" && $crlf !== "\r\n" && $crlf !== "\r") ? "\n" : $crlf;
		return $this;
	}

	// --------------------------------------------------------------------

	/**
	 * Set Message Boundary
	 *
	 * @return	void
	 */
	protected function _set_boundaries()
	{
		$this->_alt_boundary = 'B_ALT_'.uniqid(''); // multipart/alternative
		$this->_atc_boundary = 'B_ATC_'.uniqid(''); // attachment boundary
	}

	// --------------------------------------------------------------------

	/**
	 * Get the Message ID
	 *
	 * @return	string
	 */
	protected function _get_message_id()
	{
		$from = str_replace(array('>', '<'), '', $this->_headers['Return-Path']);
		return '<'.uniqid('').strstr($from, '@').'>';
	}

	// --------------------------------------------------------------------

	/**
	 * Get Mail Protocol
	 *
	 * @param	bool
	 * @return	mixed
	 */
	protected function _get_protocol($return = TRUE)
	{
		$this->protocol = strtolower($this->protocol);
		in_array($this->protocol, $this->_protocols, TRUE) OR $this->protocol = 'mail';

		if ($return === TRUE)
		{
			return $this->protocol;
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Get Mail Encoding
	 *
	 * @param	bool
	 * @return	string
	 */
	protected function _get_encoding($return = TRUE)
	{
		in_array($this->_encoding, $this->_bit_depths) OR $this->_encoding = '8bit';

		foreach ($this->_base_charsets as $charset)
		{
			if (strpos($charset, $this->charset) === 0)
			{
				$this->_encoding = '7bit';
			}
		}

		if ($return === TRUE)
		{
			return $this->_encoding;
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Get content type (text/html/attachment)
	 *
	 * @return	string
	 */
	protected function _get_content_type()
	{
		if ($this->mailtype === 'html')
		{
			return (count($this->_attachments) === 0) ? 'html' : 'html-attach';
		}
		elseif	($this->mailtype === 'text' && count($this->_attachments) > 0)
		{
			return 'plain-attach';
		}
		else
		{
			return 'plain';
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Set RFC 822 Date
	 *
	 * @return	string
	 */
	protected function _set_date()
	{
		$timezone = date('Z');
		$operator = ($timezone[0] === '-') ? '-' : '+';
		$timezone = abs($timezone);
		$timezone = floor($timezone/3600) * 100 + ($timezone % 3600) / 60;

		return sprintf('%s %s%04d', date('D, j M Y H:i:s'), $operator, $timezone);
	}

	// --------------------------------------------------------------------

	/**
	 * Mime message
	 *
	 * @return	string
	 */
	protected function _get_mime_message()
	{
		return 'This is a multi-part message in MIME format.'.$this->newline.'Your email application may not support this format.';
	}

	// --------------------------------------------------------------------

	/**
	 * Validate Email Address
	 *
	 * @param	string
	 * @return	bool
	 */
	public function validate_email($email)
	{
		if ( ! is_array($email))
		{
			$this->_set_error_message('lang:email_must_be_array');
			return FALSE;
		}

		foreach ($email as $val)
		{
			if ( ! $this->valid_email($val))
			{
				$this->_set_error_message('lang:email_invalid_address', $val);
				return FALSE;
			}
		}

		return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	 * Email Validation
	 *
	 * @param	string
	 * @return	bool
	 */
	public function valid_email($email)
	{
		if (function_exists('idn_to_ascii') && $atpos = strpos($email, '@'))
		{
			$email = substr($email, 0, ++$atpos).idn_to_ascii(substr($email, $atpos));
		}

		return (bool) filter_var($email, FILTER_VALIDATE_EMAIL);
	}

	// --------------------------------------------------------------------

	/**
	 * Clean Extended Email Address: Joe Smith <joe@smith.com>
	 *
	 * @param	string
	 * @return	string
	 */
	public function clean_email($email)
	{
		if ( ! is_array($email))
		{
			return preg_match('/\<(.*)\>/', $email, $match) ? $match[1] : $email;
		}

		$clean_email = array();

		foreach ($email as $addy)
		{
			$clean_email[] = preg_match('/\<(.*)\>/', $addy, $match) ? $match[1] : $addy;
		}

		return $clean_email;
	}

	// --------------------------------------------------------------------

	/**
	 * Build alternative plain text message
	 *
	 * Provides the raw message for use in plain-text headers of
	 * HTML-formatted emails.
	 * If the user hasn't specified his own alternative message
	 * it creates one by stripping the HTML
	 *
	 * @return	string
	 */
	protected function _get_alt_message()
	{
		if ( ! empty($this->alt_message))
		{
			return ($this->wordwrap)
				? $this->word_wrap($this->alt_message, 76)
				: $this->alt_message;
		}

		$body = preg_match('/\<body.*?\>(.*)\<\/body\>/si', $this->_body, $match) ? $match[1] : $this->_body;
		$body = str_replace("\t", '', preg_replace('#<!--(.*)--\>#', '', trim(strip_tags($body))));

		for ($i = 20; $i >= 3; $i--)
		{
			$body = str_replace(str_repeat("\n", $i), "\n\n", $body);
		}

		// Reduce multiple spaces
		$body = preg_replace('| +|', ' ', $body);

		return ($this->wordwrap)
			? $this->word_wrap($body, 76)
			: $body;
	}

	// --------------------------------------------------------------------

	/**
	 * Word Wrap
	 *
	 * @param	string
	 * @param	int	line-length limit
	 * @return	string
	 */
	public function word_wrap($str, $charlim = NULL)
	{
		// Set the character limit, if not already present
		if (empty($charlim))
		{
			$charlim = empty($this->wrapchars) ? 76 : $this->wrapchars;
		}

		// Standardize newlines
		if (strpos($str, "\r") !== FALSE)
		{
			$str = str_replace(array("\r\n", "\r"), "\n", $str);
		}

		// Reduce multiple spaces at end of line
		$str = preg_replace('| +\n|', "\n", $str);

		// If the current word is surrounded by {unwrap} tags we'll
		// strip the entire chunk and replace it with a marker.
		$unwrap = array();
		if (preg_match_all('|\{unwrap\}(.+?)\{/unwrap\}|s', $str, $matches))
		{
			for ($i = 0, $c = count($matches[0]); $i < $c; $i++)
			{
				$unwrap[] = $matches[1][$i];
				$str = str_replace($matches[0][$i], '{{unwrapped'.$i.'}}', $str);
			}
		}

		// Use PHP's native function to do the initial wordwrap.
		// We set the cut flag to FALSE so that any individual words that are
		// too long get left alone. In the next step we'll deal with them.
		$str = wordwrap($str, $charlim, "\n", FALSE);

		// Split the string into individual lines of text and cycle through them
		$output = '';
		foreach (explode("\n", $str) as $line)
		{
			// Is the line within the allowed character count?
			// If so we'll join it to the output and continue
			if (mb_strlen($line) <= $charlim)
			{
				$output .= $line.$this->newline;
				continue;
			}

			$temp = '';
			do
			{
				// If the over-length word is a URL we won't wrap it
				if (preg_match('!\[url.+\]|://|www\.!', $line))
				{
					break;
				}

				// Trim the word down
				$temp .= mb_substr($line, 0, $charlim - 1);
				$line = mb_substr($line, $charlim - 1);
			}
			while (mb_strlen($line) > $charlim);

			// If $temp contains data it means we had to split up an over-length
			// word into smaller chunks so we'll add it back to our current line
			if ($temp !== '')
			{
				$output .= $temp.$this->newline;
			}

			$output .= $line.$this->newline;
		}

		// Put our markers back
		if (count($unwrap) > 0)
		{
			foreach ($unwrap as $key => $val)
			{
				$output = str_replace('{{unwrapped'.$key.'}}', $val, $output);
			}
		}

		return $output;
	}

	// --------------------------------------------------------------------

	/**
	 * Build final headers
	 *
	 * @return	string
	 */
	protected function _build_headers()
	{
		$this->set_header('X-Sender', $this->clean_email($this->_headers['From']));
		$this->set_header('X-Mailer', $this->useragent);
		$this->set_header('X-Priority', $this->_priorities[$this->priority]);
		$this->set_header('Message-ID', $this->_get_message_id());
		$this->set_header('Mime-Version', '1.0');
	}

	// --------------------------------------------------------------------

	/**
	 * Write Headers as a string
	 *
	 * @return	void
	 */
	protected function _write_headers()
	{
		if ($this->protocol === 'mail')
		{
			if (isset($this->_headers['Subject']))
			{
				$this->_subject = $this->_headers['Subject'];
				unset($this->_headers['Subject']);
			}
		}

		reset($this->_headers);
		$this->_header_str = '';

		foreach ($this->_headers as $key => $val)
		{
			$val = trim($val);

			if ($val !== '')
			{
				$this->_header_str .= $key.': '.$val.$this->newline;
			}
		}

		if ($this->_get_protocol() === 'mail')
		{
			$this->_header_str = rtrim($this->_header_str);
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Build Final Body and attachments
	 *
	 * @return	bool
	 */
	protected function _build_message()
	{
		if ($this->wordwrap === TRUE && $this->mailtype !== 'html')
		{
			$this->_body = $this->word_wrap($this->_body);
		}

		$this->_set_boundaries();
		$this->_write_headers();

		$hdr = ($this->_get_protocol() === 'mail') ? $this->newline : '';
		$body = '';

		switch ($this->_get_content_type())
		{
			case 'plain' :

The case body in a switch statement must start on the line following the statement.

				$hdr .= 'Content-Type: text/plain; charset='.$this->charset.$this->newline
					.'Content-Transfer-Encoding: '.$this->_get_encoding();

				if ($this->_get_protocol() === 'mail')
				{
					$this->_header_str .= $hdr;
					$this->_finalbody = $this->_body;
				}
				else
				{
					$this->_finalbody = $hdr.$this->newline.$this->newline.$this->_body;
				}

				return;

			case 'html' :

The case body in a switch statement must start on the line following the statement.

				if ($this->send_multipart === FALSE)
				{
					$hdr .= 'Content-Type: text/html; charset='.$this->charset.$this->newline
						.'Content-Transfer-Encoding: quoted-printable';
				}
				else
				{
					$hdr .= 'Content-Type: multipart/alternative; boundary="'.$this->_alt_boundary.'"';

					$body .= $this->_get_mime_message().$this->newline.$this->newline
						.'--'.$this->_alt_boundary.$this->newline

						.'Content-Type: text/plain; charset='.$this->charset.$this->newline
						.'Content-Transfer-Encoding: '.$this->_get_encoding().$this->newline.$this->newline
						.$this->_get_alt_message().$this->newline.$this->newline.'--'.$this->_alt_boundary.$this->newline

						.'Content-Type: text/html; charset='.$this->charset.$this->newline
						.'Content-Transfer-Encoding: quoted-printable'.$this->newline.$this->newline;
				}

				$this->_finalbody = $body.$this->_prep_quoted_printable($this->_body).$this->newline.$this->newline;

				if ($this->_get_protocol() === 'mail')
				{
					$this->_header_str .= $hdr;
				}
				else
				{
					$this->_finalbody = $hdr.$this->newline.$this->newline.$this->_finalbody;
				}

				if ($this->send_multipart !== FALSE)
				{
					$this->_finalbody .= '--'.$this->_alt_boundary.'--';
				}

				return;

			case 'plain-attach' :

The case body in a switch statement must start on the line following the statement.

				$hdr .= 'Content-Type: multipart/'.$this->multipart.'; boundary="'.$this->_atc_boundary.'"';

				if ($this->_get_protocol() === 'mail')
				{
					$this->_header_str .= $hdr;
				}

				$body .= $this->_get_mime_message().$this->newline
					.$this->newline
					.'--'.$this->_atc_boundary.$this->newline
					.'Content-Type: text/plain; charset='.$this->charset.$this->newline
					.'Content-Transfer-Encoding: '.$this->_get_encoding().$this->newline
					.$this->newline
					.$this->_body.$this->newline.$this->newline;

			break;
			case 'html-attach' :

The case body in a switch statement must start on the line following the statement.

				$hdr .= 'Content-Type: multipart/'.$this->multipart.'; boundary="'.$this->_atc_boundary.'"';

				if ($this->_get_protocol() === 'mail')
				{
					$this->_header_str .= $hdr;
				}

				$body .= $this->_get_mime_message().$this->newline.$this->newline
					.'--'.$this->_atc_boundary.$this->newline

					.'Content-Type: multipart/alternative; boundary="'.$this->_alt_boundary.'"'.$this->newline.$this->newline
					.'--'.$this->_alt_boundary.$this->newline

					.'Content-Type: text/plain; charset='.$this->charset.$this->newline
					.'Content-Transfer-Encoding: '.$this->_get_encoding().$this->newline.$this->newline
					.$this->_get_alt_message().$this->newline.$this->newline.'--'.$this->_alt_boundary.$this->newline

					.'Content-Type: text/html; charset='.$this->charset.$this->newline
					.'Content-Transfer-Encoding: quoted-printable'.$this->newline.$this->newline

					.$this->_prep_quoted_printable($this->_body).$this->newline.$this->newline
					.'--'.$this->_alt_boundary.'--'.$this->newline.$this->newline;

			break;
		}

		$attachment = array();
		for ($i = 0, $c = count($this->_attachments), $z = 0; $i < $c; $i++)
		{
			$filename = $this->_attachments[$i]['name'][0];
			$basename = ($this->_attachments[$i]['name'][1] === NULL)
				? basename($filename) : $this->_attachments[$i]['name'][1];

			$attachment[$z++] = '--'.$this->_atc_boundary.$this->newline
				.'Content-type: '.$this->_attachments[$i]['type'].'; '
				.'name="'.$basename.'"'.$this->newline
				.'Content-Disposition: '.$this->_attachments[$i]['disposition'].';'.$this->newline
				.'Content-Transfer-Encoding: base64'.$this->newline
				.(empty($this->_attachments[$i]['cid']) ? '' : 'Content-ID: <'.$this->_attachments[$i]['cid'].'>'.$this->newline);

			$attachment[$z++] = $this->_attachments[$i]['content'];
		}

		$body .= implode($this->newline, $attachment).$this->newline.'--'.$this->_atc_boundary.'--';
		$this->_finalbody = ($this->_get_protocol() === 'mail')
			? $body
			: $hdr.$this->newline.$this->newline.$body;

		return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	 * Prep Quoted Printable
	 *
	 * Prepares string for Quoted-Printable Content-Transfer-Encoding
	 * Refer to RFC 2045 http://www.ietf.org/rfc/rfc2045.txt
	 *
	 * @param	string
	 * @return	string
	 */
	protected function _prep_quoted_printable($str)
	{
		// ASCII code numbers for "safe" characters that can always be
		// used literally, without encoding, as described in RFC 2049.
		// http://www.ietf.org/rfc/rfc2049.txt
		static $ascii_safe_chars = array(
			// ' (  )   +   ,   -   .   /   :   =   ?
			39, 40, 41, 43, 44, 45, 46, 47, 58, 61, 63,
			// numbers
			48, 49, 50, 51, 52, 53, 54, 55, 56, 57,
			// upper-case letters
			65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90,
			// lower-case letters
			97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122
		);

		// We are intentionally wrapping so mail servers will encode characters
		// properly and MUAs will behave, so {unwrap} must go!
		$str = str_replace(array('{unwrap}', '{/unwrap}'), '', $str);

		// RFC 2045 specifies CRLF as "\r\n".
		// However, many developers choose to override that and violate
		// the RFC rules due to (apparently) a bug in MS Exchange,
		// which only works with "\n".
		if ($this->crlf === "\r\n")
		{
			if (is_php('5.3'))
			{
				return quoted_printable_encode($str);
			}
			elseif (function_exists('imap_8bit'))
			{
				return imap_8bit($str);
			}
		}

		// Reduce multiple spaces & remove nulls
		$str = preg_replace(array('| +|', '/\x00+/'), array(' ', ''), $str);

		// Standardize newlines
		if (strpos($str, "\r") !== FALSE)
		{
			$str = str_replace(array("\r\n", "\r"), "\n", $str);
		}

		$escape = '=';
		$output = '';

		foreach (explode("\n", $str) as $line)
		{
			$length = strlen($line);
			$temp = '';

			// Loop through each character in the line to add soft-wrap
			// characters at the end of a line " =\r\n" and add the newly
			// processed line(s) to the output (see comment on $crlf class property)
			for ($i = 0; $i < $length; $i++)
			{
				// Grab the next character
				$char = $line[$i];
				$ascii = ord($char);

				// Convert spaces and tabs but only if it's the end of the line
				if ($ascii === 32 OR $ascii === 9)
				{
					if ($i === ($length - 1))
					{
						$char = $escape.sprintf('%02s', dechex($ascii));
					}
				}
				// DO NOT move this below the $ascii_safe_chars line!
				//
				// = (equals) signs are allowed by RFC2049, but must be encoded
				// as they are the encoding delimiter!
				elseif ($ascii === 61)
				{
					$char = $escape.strtoupper(sprintf('%02s', dechex($ascii)));  // =3D
				}
				elseif ( ! in_array($ascii, $ascii_safe_chars, TRUE))
				{
					$char = $escape.strtoupper(sprintf('%02s', dechex($ascii)));
				}

				// If we're at the character limit, add the line to the output,
				// reset our temp variable, and keep on chuggin'
				if ((strlen($temp) + strlen($char)) >= 76)
				{
					$output .= $temp.$escape.$this->crlf;
					$temp = '';
				}

				// Add the character to our temporary line
				$temp .= $char;
			}

			// Add our completed line to the output
			$output .= $temp.$this->crlf;
		}

		// get rid of extra CRLF tacked onto the end
		return substr($output, 0, strlen($this->crlf) * -1);
	}

	// --------------------------------------------------------------------

	/**
	 * Prep Q Encoding
	 *
	 * Performs "Q Encoding" on a string for use in email headers.
	 * It's related but not identical to quoted-printable, so it has its
	 * own method.
	 *
	 * @param	string
	 * @return	string
	 */
	protected function _prep_q_encoding($str)
	{
		$str = str_replace(array("\r", "\n"), '', $str);

		if ($this->charset === 'UTF-8')
		{
			// Note: We used to have mb_encode_mimeheader() as the first choice
			//       here, but it turned out to be buggy and unreliable. DO NOT
			//       re-add it! -- Narf
			if (ICONV_ENABLED === TRUE)
			{
				$output = @iconv_mime_encode('', $str,
					array(
						'scheme' => 'Q',
						'line-length' => 76,
						'input-charset' => $this->charset,
						'output-charset' => $this->charset,
						'line-break-chars' => $this->crlf
					)
				);

				// There are reports that iconv_mime_encode() might fail and return FALSE
				if ($output !== FALSE)
				{
					// iconv_mime_encode() will always put a header field name.
					// We've passed it an empty one, but it still prepends our
					// encoded string with ': ', so we need to strip it.
					return substr($output, 2);
				}

				$chars = iconv_strlen($str, 'UTF-8');
			}
			elseif (MB_ENABLED === TRUE)
			{
				$chars = mb_strlen($str, 'UTF-8');
			}
		}

		// We might already have this set for UTF-8
		isset($chars) OR $chars = strlen($str);

		$output = '=?'.$this->charset.'?Q?';
		for ($i = 0, $length = strlen($output); $i < $chars; $i++)
		{
			$chr = ($this->charset === 'UTF-8' && ICONV_ENABLED === TRUE)
				? '='.implode('=', str_split(strtoupper(bin2hex(iconv_substr($str, $i, 1, $this->charset))), 2))
				: '='.strtoupper(bin2hex($str[$i]));

			// RFC 2045 sets a limit of 76 characters per line.
			// We'll append ?= to the end of each line though.
			if ($length + ($l = strlen($chr)) > 74)
			{
				$output .= '?='.$this->crlf // EOL
					.' =?'.$this->charset.'?Q?'.$chr; // New line
				$length = 6 + strlen($this->charset) + $l; // Reset the length for the new line
			}
			else
			{
				$output .= $chr;
				$length += $l;
			}
		}

		// End the header
		return $output.'?=';
	}

	// --------------------------------------------------------------------

	/**
	 * Send Email
	 *
	 * @param	bool	$auto_clear = TRUE
	 * @return	bool
	 */
	public function send($auto_clear = TRUE)
	{
		if ( ! isset($this->_headers['From']))
		{
			$this->_set_error_message('lang:email_no_from');
			return FALSE;
		}

		if ($this->_replyto_flag === FALSE)
		{
			$this->reply_to($this->_headers['From']);
		}

		if ( ! isset($this->_recipients) && ! isset($this->_headers['To'])
			&& ! isset($this->_bcc_array) && ! isset($this->_headers['Bcc'])
			&& ! isset($this->_headers['Cc']))
		{
			$this->_set_error_message('lang:email_no_recipients');
			return FALSE;
		}

		$this->_build_headers();

		if ($this->bcc_batch_mode && count($this->_bcc_array) > $this->bcc_batch_size)
		{
			$result = $this->batch_bcc_send();

			if ($result && $auto_clear)
			{
				$this->clear();
			}

			return $result;
		}

		if ($this->_build_message() === FALSE)
		{
			return FALSE;
		}

		$result = $this->_spool_email();

		if ($result && $auto_clear)
		{
			$this->clear();
		}

		return $result;
	}

	// --------------------------------------------------------------------

	/**
	 * Batch Bcc Send. Sends groups of BCCs in batches
	 *
	 * @return	void
	 */
	public function batch_bcc_send()
	{
		$float = $this->bcc_batch_size - 1;
		$set = '';
		$chunk = array();

		for ($i = 0, $c = count($this->_bcc_array); $i < $c; $i++)
		{
			if (isset($this->_bcc_array[$i]))
			{
				$set .= ', '.$this->_bcc_array[$i];
			}

			if ($i === $float)
			{
				$chunk[] = substr($set, 1);
				$float += $this->bcc_batch_size;
				$set = '';
			}

			if ($i === $c-1)
			{
				$chunk[] = substr($set, 1);
			}
		}

		for ($i = 0, $c = count($chunk); $i < $c; $i++)
		{
			unset($this->_headers['Bcc']);

			$bcc = $this->clean_email($this->_str_to_array($chunk[$i]));

			if ($this->protocol !== 'smtp')
			{
				$this->set_header('Bcc', implode(', ', $bcc));
			}
			else
			{
				$this->_bcc_array = $bcc;
			}

			if ($this->_build_message() === FALSE)
			{
				return FALSE;
			}

			$this->_spool_email();
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Unwrap special elements
	 *
	 * @return	void
	 */
	protected function _unwrap_specials()
	{
		$this->_finalbody = preg_replace_callback('/\{unwrap\}(.*?)\{\/unwrap\}/si', array($this, '_remove_nl_callback'), $this->_finalbody);
	}

	// --------------------------------------------------------------------

	/**
	 * Strip line-breaks via callback
	 *
	 * @param	string	$matches
	 * @return	string
	 */
	protected function _remove_nl_callback($matches)
	{
		if (strpos($matches[1], "\r") !== FALSE OR strpos($matches[1], "\n") !== FALSE)
		{
			$matches[1] = str_replace(array("\r\n", "\r", "\n"), '', $matches[1]);
		}

		return $matches[1];
	}

	// --------------------------------------------------------------------

	/**
	 * Spool mail to the mail server
	 *
	 * @return	bool
	 */
	protected function _spool_email()
	{
		$this->_unwrap_specials();

		$method = '_send_with_'.$this->_get_protocol();
		if ( ! $this->$method())
		{
			$this->_set_error_message('lang:email_send_failure_'.($this->_get_protocol() === 'mail' ? 'phpmail' : $this->_get_protocol()));
			return FALSE;
		}

		$this->_set_error_message('lang:email_sent', $this->_get_protocol());
		return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	 * Send using mail()
	 *
	 * @return	bool
	 */
	protected function _send_with_mail()
	{
		if (is_array($this->_recipients))
		{
			$this->_recipients = implode(', ', $this->_recipients);
		}

		if ($this->_safe_mode === TRUE)
		{
			return mail($this->_recipients, $this->_subject, $this->_finalbody, $this->_header_str);
		}
		else
		{
			// most documentation of sendmail using the "-f" flag lacks a space after it, however
			// we've encountered servers that seem to require it to be in place.
			return mail($this->_recipients, $this->_subject, $this->_finalbody, $this->_header_str, '-f '.$this->clean_email($this->_headers['Return-Path']));
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Send using Sendmail
	 *
	 * @return	bool
	 */
	protected function _send_with_sendmail()
	{
		// is popen() enabled?
		if ( ! function_usable('popen')
			OR FALSE === ($fp = @popen(
						$this->mailpath.' -oi -f '.$this->clean_email($this->_headers['From']).' -t'
						, 'w'))
		) // server probably has popen disabled, so nothing we can do to get a verbose error.
		{
			return FALSE;
		}

		fputs($fp, $this->_header_str);
		fputs($fp, $this->_finalbody);

		$status = pclose($fp);

		if ($status !== 0)
		{
			$this->_set_error_message('lang:email_exit_status', $status);
			$this->_set_error_message('lang:email_no_socket');
			return FALSE;
		}

		return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	 * Send using SMTP
	 *
	 * @return	bool
	 */
	protected function _send_with_smtp()
	{
		if ($this->smtp_host === '')
		{
			$this->_set_error_message('lang:email_no_hostname');
			return FALSE;
		}

		if ( ! $this->_smtp_connect() OR ! $this->_smtp_authenticate())
		{
			return FALSE;
		}

		if ( ! $this->_send_command('from', $this->clean_email($this->_headers['From'])))
		{
			return FALSE;
		}

		foreach ($this->_recipients as $val)
		{
			if ( ! $this->_send_command('to', $val))
			{
				return FALSE;
			}
		}

		if (count($this->_cc_array) > 0)
		{
			foreach ($this->_cc_array as $val)
			{
				if ($val !== '' && ! $this->_send_command('to', $val))
				{
					return FALSE;
				}
			}
		}

		if (count($this->_bcc_array) > 0)
		{
			foreach ($this->_bcc_array as $val)
			{
				if ($val !== '' && ! $this->_send_command('to', $val))
				{
					return FALSE;
				}
			}
		}

		if ( ! $this->_send_command('data'))
		{
			return FALSE;
		}

		// perform dot transformation on any lines that begin with a dot
		$this->_send_data($this->_header_str.preg_replace('/^\./m', '..$1', $this->_finalbody));

		$this->_send_data('.');

		$reply = $this->_get_smtp_data();

		$this->_set_error_message($reply);

		if (strpos($reply, '250') !== 0)
		{
			$this->_set_error_message('lang:email_smtp_error', $reply);
			return FALSE;
		}

		if ($this->smtp_keepalive)
		{
			$this->_send_command('reset');
		}
		else
		{
			$this->_send_command('quit');
		}

		return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	 * SMTP Connect
	 *
	 * @return	string
	 */
	protected function _smtp_connect()
	{
		if (is_resource($this->_smtp_connect))
		{
			return TRUE;
		}

		$ssl = ($this->smtp_crypto === 'ssl') ? 'ssl://' : '';

		$this->_smtp_connect = fsockopen($ssl.$this->smtp_host,
							$this->smtp_port,
							$errno,
							$errstr,
							$this->smtp_timeout);

		if ( ! is_resource($this->_smtp_connect))
		{
			$this->_set_error_message('lang:email_smtp_error', $errno.' '.$errstr);
			return FALSE;
		}

		stream_set_timeout($this->_smtp_connect, $this->smtp_timeout);
		$this->_set_error_message($this->_get_smtp_data());

		if ($this->smtp_crypto === 'tls')
		{
			$this->_send_command('hello');
			$this->_send_command('starttls');

			$crypto = stream_socket_enable_crypto($this->_smtp_connect, TRUE, STREAM_CRYPTO_METHOD_TLS_CLIENT);

			if ($crypto !== TRUE)
			{
				$this->_set_error_message('lang:email_smtp_error', $this->_get_smtp_data());
				return FALSE;
			}
		}

		return $this->_send_command('hello');
	}

	// --------------------------------------------------------------------

	/**
	 * Send SMTP command
	 *
	 * @param	string
	 * @param	string
	 * @return	string
	 */
	protected function _send_command($cmd, $data = '')
	{
		switch ($cmd)
		{
			case 'hello' :

The case body in a switch statement must start on the line following the statement.

						if ($this->_smtp_auth OR $this->_get_encoding() === '8bit')
						{
							$this->_send_data('EHLO '.$this->_get_hostname());
						}
						else
						{
							$this->_send_data('HELO '.$this->_get_hostname());
						}

						$resp = 250;
			break;
			case 'starttls'	:

The case body in a switch statement must start on the line following the statement.

						$this->_send_data('STARTTLS');
						$resp = 220;
			break;
			case 'from' :

The case body in a switch statement must start on the line following the statement.

						$this->_send_data('MAIL FROM:<'.$data.'>');
						$resp = 250;
			break;
			case 'to' :

The case body in a switch statement must start on the line following the statement.

						if ($this->dsn)
						{
							$this->_send_data('RCPT TO:<'.$data.'> NOTIFY=SUCCESS,DELAY,FAILURE ORCPT=rfc822;'.$data);
						}
						else
						{
							$this->_send_data('RCPT TO:<'.$data.'>');
						}

						$resp = 250;
			break;
			case 'data'	:

The case body in a switch statement must start on the line following the statement.

						$this->_send_data('DATA');
						$resp = 354;
			break;
			case 'reset':

The case body in a switch statement must start on the line following the statement.

						$this->_send_data('RSET');
						$resp = 250;
			break;
			case 'quit'	:

The case body in a switch statement must start on the line following the statement.

						$this->_send_data('QUIT');
						$resp = 221;
			break;
		}

		$reply = $this->_get_smtp_data();

		$this->_debug_msg[] = '<pre>'.$cmd.': '.$reply.'</pre>';

		if ((int) substr($reply, 0, 3) !== $resp)
		{
			$this->_set_error_message('lang:email_smtp_error', $reply);
			return FALSE;
		}

		if ($cmd === 'quit')
		{
			fclose($this->_smtp_connect);
		}

		return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	 * SMTP Authenticate
	 *
	 * @return	bool
	 */
	protected function _smtp_authenticate()
	{
		if ( ! $this->_smtp_auth)
		{
			return TRUE;
		}

		if ($this->smtp_user === '' && $this->smtp_pass === '')
		{
			$this->_set_error_message('lang:email_no_smtp_unpw');
			return FALSE;
		}

		$this->_send_data('AUTH LOGIN');

		$reply = $this->_get_smtp_data();

		if (strpos($reply, '503') === 0)	// Already authenticated
		{
			return TRUE;
		}
		elseif (strpos($reply, '334') !== 0)
		{
			$this->_set_error_message('lang:email_failed_smtp_login', $reply);
			return FALSE;
		}

		$this->_send_data(base64_encode($this->smtp_user));

		$reply = $this->_get_smtp_data();

		if (strpos($reply, '334') !== 0)
		{
			$this->_set_error_message('lang:email_smtp_auth_un', $reply);
			return FALSE;
		}

		$this->_send_data(base64_encode($this->smtp_pass));

		$reply = $this->_get_smtp_data();

		if (strpos($reply, '235') !== 0)
		{
			$this->_set_error_message('lang:email_smtp_auth_pw', $reply);
			return FALSE;
		}

		return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	 * Send SMTP data
	 *
	 * @param	string	$data
	 * @return	bool
	 */
	protected function _send_data($data)
	{
		$data .= $this->newline;
		for ($written = $timestamp = 0, $length = strlen($data); $written < $length; $written += $result)
		{
			if (($result = fwrite($this->_smtp_connect, substr($data, $written))) === FALSE)
			{
				break;
			}
			// See https://bugs.php.net/bug.php?id=39598 and http://php.net/manual/en/function.fwrite.php#96951
			elseif ($result === 0)
			{
				if ($timestamp === 0)
				{
					$timestamp = time();
				}
				elseif ($timestamp < (time() - $this->smtp_timeout))
				{
					$result = FALSE;
					break;
				}

				usleep(250000);
				continue;
			}
			else
			{
				$timestamp = 0;
			}
		}

		if ($result === FALSE)
		{
			$this->_set_error_message('lang:email_smtp_data_failure', $data);
			return FALSE;
		}

		return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	 * Get SMTP data
	 *
	 * @return	string
	 */
	protected function _get_smtp_data()
	{
		$data = '';

		while ($str = fgets($this->_smtp_connect, 512))
		{
			$data .= $str;

			if ($str[3] === ' ')
			{
				break;
			}
		}

		return $data;
	}

	// --------------------------------------------------------------------

	/**
	 * Get Hostname
	 *
	 * There are only two legal types of hostname - either a fully
	 * qualified domain name (eg: "mail.example.com") or an IP literal
	 * (eg: "[1.2.3.4]").
	 *
	 * @link	https://tools.ietf.org/html/rfc5321#section-2.3.5
	 * @link	http://cbl.abuseat.org/namingproblems.html
	 * @return	string
	 */
	protected function _get_hostname()
	{
		if (isset($_SERVER['SERVER_NAME']))
		{
			return $_SERVER['SERVER_NAME'];
		}

		return isset($_SERVER['SERVER_ADDR']) ? '['.$_SERVER['SERVER_ADDR'].']' : '[127.0.0.1]';
	}

	// --------------------------------------------------------------------

	/**
	 * Get Debug Message
	 *
	 * @param	array	$include	List of raw data chunks to include in the output
	 *					Valid options are: 'headers', 'subject', 'body'
	 * @return	string
	 */
	public function print_debugger($include = array('headers', 'subject', 'body'))
	{
		$msg = '';

		if (count($this->_debug_msg) > 0)
		{
			foreach ($this->_debug_msg as $val)
			{
				$msg .= $val;
			}
		}

		// Determine which parts of our raw data needs to be printed
		$raw_data = '';
		is_array($include) OR $include = array($include);

		if (in_array('headers', $include, TRUE))
		{
			$raw_data = htmlspecialchars($this->_header_str)."\n";
		}

		if (in_array('subject', $include, TRUE))
		{
			$raw_data .= htmlspecialchars($this->_subject)."\n";
		}

		if (in_array('body', $include, TRUE))
		{
			$raw_data .= htmlspecialchars($this->_finalbody);
		}

		return $msg.($raw_data === '' ? '' : '<pre>'.$raw_data.'</pre>');
	}

	// --------------------------------------------------------------------

	/**
	 * Set Message
	 *
	 * @param	string	$msg
	 * @param	string	$val = ''
	 * @return	void
	 */
	protected function _set_error_message($msg, $val = '')
	{
		$CI =& get_instance();
		$CI->lang->load('email');

		if (sscanf($msg, 'lang:%s', $line) !== 1 OR FALSE === ($line = $CI->lang->line($line)))
		{
			$this->_debug_msg[] = str_replace('%s', $val, $msg).'<br />';
		}
		else
		{
			$this->_debug_msg[] = str_replace('%s', $val, $line).'<br />';
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Mime Types
	 *
	 * @param	string
	 * @return	string
	 */
	protected function _mime_types($ext = '')
	{
		$ext = strtolower($ext);

		$mimes =& get_mimes();

		if (isset($mimes[$ext]))
		{
			return is_array($mimes[$ext])
				? current($mimes[$ext])
				: $mimes[$ext];
		}

		return 'application/x-unknown-content-type';
	}

}