class.phpmailer.php

<?php
/**
 * PHPMailer - PHP email creation and transport class.
 * PHP Version 5.0.0
 * Version 5.2.7
 * @package PHPMailer
 * @link https://github.com/PHPMailer/PHPMailer/
 * @author Marcus Bointon (coolbru) <phpmailer@synchromedia.co.uk>
 * @author Jim Jagielski (jimjag) <jimjag@gmail.com>
 * @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
 * @author Brent R. Matzelle (original founder)
 * @copyright 2013 Marcus Bointon
 * @copyright 2010 - 2012 Jim Jagielski
 * @copyright 2004 - 2009 Andy Prevost
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 * @note This program is distributed in the hope that it will be useful - WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 */

if (version_compare(PHP_VERSION, '5.0.0', '<')) {
    exit("Sorry, PHPMailer will only run on PHP version 5 or greater!\n");
}

require_once 'class.smtp.php';
require_once 'class.pop3.php';

/**
 * PHPMailer - PHP email creation and transport class.
 * PHP Version 5.0.0
 * @package PHPMailer
 * @author Marcus Bointon (coolbru) <phpmailer@synchromedia.co.uk>
 * @author Jim Jagielski (jimjag) <jimjag@gmail.com>
 * @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net>
 * @author Brent R. Matzelle (original founder)
 * @copyright 2013 Marcus Bointon
 * @copyright 2010 - 2012 Jim Jagielski
 * @copyright 2004 - 2009 Andy Prevost
 */
class PHPMailer
{
    /**
     * The PHPMailer Version number.
     * @type string
     */
    public $Version = '5.2.7';

    /**
     * Email priority.
     * Options: 1 = High, 3 = Normal, 5 = low.
     * @type int
     */
    public $Priority = 3;

    /**
     * The character set of the message.
     * @type string
     */
    public $CharSet = 'iso-8859-1';

    /**
     * The MIME Content-type of the message.
     * @type string
     */
    public $ContentType = 'text/plain';

    /**
     * The message encoding.
     * Options: "8bit", "7bit", "binary", "base64", and "quoted-printable".
     * @type string
     */
    public $Encoding = '8bit';

    /**
     * Holds the most recent mailer error message.
     * @type string
     */
    public $ErrorInfo = '';

    /**
     * The From email address for the message.
     * @type string
     */
    public $From = 'root@localhost';

    /**
     * The From name of the message.
     * @type string
     */
    public $FromName = 'Root User';

    /**
     * The Sender email (Return-Path) of the message.
     * If not empty, will be sent via -f to sendmail or as 'MAIL FROM' in smtp mode.
     * @type string
     */
    public $Sender = '';

    /**
     * The Return-Path of the message.
     * If empty, it will be set to either From or Sender.
     * @type string
     */
    public $ReturnPath = '';

    /**
     * The Subject of the message.
     * @type string
     */
    public $Subject = '';

    /**
     * An HTML or plain text message body.
     * If HTML then call isHTML(true).
     * @type string
     */
    public $Body = '';

    /**
     * The plain-text message body.
     * This body can be read by mail clients that do not have HTML email
     * capability such as mutt & Eudora.
     * Clients that can read HTML will view the normal Body.
     * @type string
     */
    public $AltBody = '';

    /**
     * An iCal message part body.
     * Only supported in simple alt or alt_inline message types
     * To generate iCal events, use the bundled extras/EasyPeasyICS.php class or iCalcreator
     * @link http://sprain.ch/blog/downloads/php-class-easypeasyics-create-ical-files-with-php/
     * @link http://kigkonsult.se/iCalcreator/
     * @type string
     */
    public $Ical = '';

    /**
     * The complete compiled MIME message body.
     * @access protected
     * @type string
     */
    protected $MIMEBody = '';

    /**
     * The complete compiled MIME message headers.
     * @type string
     * @access protected
     */
    protected $MIMEHeader = '';

    /**
     * Extra headers that createHeader() doesn't fold in.
     * @type string
     * @access protected
     */
    protected $mailHeader = '';

    /**
     * Word-wrap the message body to this number of chars.
     * @type int
     */
    public $WordWrap = 0;

    /**
     * Which method to use to send mail.
     * Options: "mail", "sendmail", or "smtp".
     * @type string
     */
    public $Mailer = 'mail';

    /**
     * The path to the sendmail program.
     * @type string
     */
    public $Sendmail = '/usr/sbin/sendmail';

    /**
     * Whether mail() uses a fully sendmail-compatible MTA.
     * One which supports sendmail's "-oi -f" options.
     * @type bool
     */
    public $UseSendmailOptions = true;

    /**
     * Path to PHPMailer plugins.
     * Useful if the SMTP class is not in the PHP include path.
     * @type string
     * @deprecated Should not be needed now there is an autoloader.
     */
    public $PluginDir = '';

    /**
     * The email address that a reading confirmation should be sent to.
     * @type string
     */
    public $ConfirmReadingTo = '';

    /**
     * The hostname to use in Message-Id and Received headers
     * and as default HELO string.
     * If empty, the value returned
     * by SERVER_NAME is used or 'localhost.localdomain'.
     * @type string
     */
    public $Hostname = '';

    /**
     * An ID to be used in the Message-Id header.
     * If empty, a unique id will be generated.
     * @type string
     */
    public $MessageID = '';

    /**
     * The message Date to be used in the Date header.
     * If empty, the current date will be added.
     * @type string
     */
    public $MessageDate = '';

    /**
     * SMTP hosts.
     * Either a single hostname or multiple semicolon-delimited hostnames.
     * You can also specify a different port
     * for each host by using this format: [hostname:port]
     * (e.g. "smtp1.example.com:25;smtp2.example.com").
     * Hosts will be tried in order.
     * @type string
     */
    public $Host = 'localhost';

    /**
     * The default SMTP server port.
     * @type int
     * @Todo Why is this needed when the SMTP class takes care of it?
     */
    public $Port = 25;

    /**
     * The SMTP HELO of the message.
     * Default is $Hostname.
     * @type string
     * @see PHPMailer::$Hostname
     */
    public $Helo = '';

    /**
     * The secure connection prefix.
     * Options: "", "ssl" or "tls"
     * @type string
     */
    public $SMTPSecure = '';

    /**
     * Whether to use SMTP authentication.
     * Uses the Username and Password properties.
     * @type bool
     * @see PHPMailer::$Username
     * @see PHPMailer::$Password
     */
    public $SMTPAuth = false;

    /**
     * SMTP username.
     * @type string
     */
    public $Username = '';

    /**
     * SMTP password.
     * @type string
     */
    public $Password = '';

    /**
     * SMTP auth type.
     * Options are LOGIN (default), PLAIN, NTLM, CRAM-MD5
     * @type string
     */
    public $AuthType = '';

    /**
     * SMTP realm.
     * Used for NTLM auth
     * @type string
     */
    public $Realm = '';

    /**
     * SMTP workstation.
     * Used for NTLM auth
     * @type string
     */
    public $Workstation = '';

    /**
     * The SMTP server timeout in seconds.
     * @type int
     */
    public $Timeout = 10;

    /**
     * SMTP class debug output mode.
     * Options: 0 = off, 1 = commands, 2 = commands and data
     * @type int
     * @see SMTP::$do_debug
     */
    public $SMTPDebug = 0;

    /**
     * The function/method to use for debugging output.
     * Options: "echo" or "error_log"
     * @type string
     * @see SMTP::$Debugoutput
     */
    public $Debugoutput = "echo";

    /**
     * Whether to keep SMTP connection open after each message.
     * If this is set to true then to close the connection
     * requires an explicit call to smtpClose().
     * @type bool
     */
    public $SMTPKeepAlive = false;

    /**
     * Whether to split multiple to addresses into multiple messages
     * or send them all in one message.
     * @type bool
     */
    public $SingleTo = false;

    /**
     * Storage for addresses when SingleTo is enabled.
     * @type array
     * @todo This should really not be public
     */
    public $SingleToArray = array();

    /**
     * Whether to generate VERP addresses on send.
     * Only applicable when sending via SMTP.
     * @link http://en.wikipedia.org/wiki/Variable_envelope_return_path
     * @type bool
     */
    public $do_verp = false;

    /**
     * Whether to allow sending messages with an empty body.
     * @type bool
     */
    public $AllowEmpty = false;

    /**
     * The default line ending.
     * @note The default remains "\n". We force CRLF where we know
     *        it must be used via self::CRLF.
     * @type string
     */
    public $LE = "\n";

    /**
     * DKIM selector.
     * @type string
     */
    public $DKIM_selector = '';

    /**
     * DKIM Identity.
     * Usually the email address used as the source of the email
     * @type string
     */
    public $DKIM_identity = '';

    /**
     * DKIM passphrase.
     * Used if your key is encrypted.
     * @type string
     */
    public $DKIM_passphrase = '';

    /**
     * DKIM signing domain name.
     * @example 'example.com'
     * @type string
     */
    public $DKIM_domain = '';

    /**
     * DKIM private key file path.
     * @type string
     */
    public $DKIM_private = '';

    /**
     * Callback Action function name.
     *
     * The function that handles the result of the send email action.
     * It is called out by send() for each email sent.
     *
     * Value can be any php callable: http://www.php.net/is_callable
     *
     * Parameters:
     *   bool    $result        result of the send action
     *   string  $to            email address of the recipient
     *   string  $cc            cc email addresses
     *   string  $bcc           bcc email addresses
     *   string  $subject       the subject
     *   string  $body          the email body
     *   string  $from          email address of sender
     * @type string
     */
    public $action_function = '';

    /**
     * What to use in the X-Mailer header.
     * Options: null for default, whitespace for none, or a string to use
     * @type string
     */
    public $XMailer = '';

    /**
     * An instance of the SMTP sender class.
     * @type SMTP
     * @access protected
     */
    protected $smtp = null;

    /**
     * The array of 'to' addresses.
     * @type array
     * @access protected
     */
    protected $to = array();

    /**
     * The array of 'cc' addresses.
     * @type array
     * @access protected
     */
    protected $cc = array();

    /**
     * The array of 'bcc' addresses.
     * @type array
     * @access protected
     */
    protected $bcc = array();

    /**
     * The array of reply-to names and addresses.
     * @type array
     * @access protected
     */
    protected $ReplyTo = array();

    /**
     * An array of all kinds of addresses.
     * Includes all of $to, $cc, $bcc, $replyto
     * @type array
     * @access protected
     */
    protected $all_recipients = array();

    /**
     * The array of attachments.
     * @type array
     * @access protected
     */
    protected $attachment = array();

    /**
     * The array of custom headers.
     * @type array
     * @access protected
     */
    protected $CustomHeader = array();

    /**
     * The most recent Message-ID (including angular brackets).
     * @type string
     * @access protected
     */
    protected $lastMessageID = '';

    /**
     * The message's MIME type.
     * @type string
     * @access protected
     */
    protected $message_type = '';

    /**
     * The array of MIME boundary strings.
     * @type array
     * @access protected
     */
    protected $boundary = array();

    /**
     * The array of available languages.
     * @type array
     * @access protected
     */
    protected $language = array();

    /**
     * The number of errors encountered.
     * @type integer
     * @access protected
     */
    protected $error_count = 0;

    /**
     * The S/MIME certificate file path.
     * @type string
     * @access protected
     */
    protected $sign_cert_file = '';

    /**
     * The S/MIME key file path.
     * @type string
     * @access protected
     */
    protected $sign_key_file = '';

    /**
     * The S/MIME password for the key.
     * Used only if the key is encrypted.
     * @type string
     * @access protected
     */
    protected $sign_key_pass = '';

    /**
     * Whether to throw exceptions for errors.
     * @type bool
     * @access protected
     */
    protected $exceptions = false;

    /**
     * Error severity: message only, continue processing
     */
    const STOP_MESSAGE = 0;

    /**
     * Error severity: message, likely ok to continue processing
     */
    const STOP_CONTINUE = 1;

    /**
     * Error severity: message, plus full stop, critical error reached
     */
    const STOP_CRITICAL = 2;

    /**
     * SMTP RFC standard line ending
     */
    const CRLF = "\r\n";

    /**
     * Constructor
     * @param bool $exceptions Should we throw external exceptions?
     */
    public function __construct($exceptions = false)
    {
        $this->exceptions = ($exceptions == true);
    }

    /**
     * Destructor.
     */
    public function __destruct()
    {
        if ($this->Mailer == 'smtp') { //close any open SMTP connection nicely
            $this->smtpClose();
        }
    }

    /**
     * Call mail() in a safe_mode-aware fashion.
     * Also, unless sendmail_path points to sendmail (or something that
     * claims to be sendmail), don't pass params (not a perfect fix,
     * but it will do)
     * @param string $to To
     * @param string $subject Subject
     * @param string $body Message Body
     * @param string $header Additional Header(s)
     * @param string $params Params
     * @access private
     * @return bool
     */
    private function mailPassthru($to, $subject, $body, $header, $params)
    {
        //Check overloading of mail function to avoid double-encoding
        if (ini_get('mbstring.func_overload') & 1) {
            $subject = $this->secureHeader($subject);
        } else {
            $subject = $this->encodeHeader($this->secureHeader($subject));
        }
        if (ini_get('safe_mode') || !($this->UseSendmailOptions)) {
            $rt = @mail($to, $subject, $body, $header);
        } else {
            $rt = @mail($to, $subject, $body, $header, $params);
        }
        return $rt;
    }

    /**
     * Output debugging info via user-defined method.
     * Only if debug output is enabled.
     * @see PHPMailer::$Debugoutput
     * @see PHPMailer::$SMTPDebug
     * @param string $str
     */
    protected function edebug($str)
    {
        if (!$this->SMTPDebug) {
            return;
        }
        switch ($this->Debugoutput) {
            case 'error_log':
                error_log($str);
                break;
            case 'html':
                //Cleans up output a bit for a better looking display that's HTML-safe
                echo htmlentities(preg_replace('/[\r\n]+/', '', $str), ENT_QUOTES, $this->CharSet) . "<br>\n";
                break;
            case 'echo':
            default:
                echo $str."\n";
        }
    }

    /**
     * Sets message type to HTML or plain.
     * @param bool $ishtml True for HTML mode.
     * @return void
     */
    public function isHTML($ishtml = true)
    {
        if ($ishtml) {
            $this->ContentType = 'text/html';
        } else {
            $this->ContentType = 'text/plain';
        }
    }

    /**
     * Send messages using SMTP.
     * @return void
     */
    public function isSMTP()
    {
        $this->Mailer = 'smtp';
    }

    /**
     * Send messages using PHP's mail() function.
     * @return void
     */
    public function isMail()
    {
        $this->Mailer = 'mail';
    }

    /**
     * Send messages using $Sendmail.
     * @return void
     */
    public function isSendmail()
    {
        if (!stristr(ini_get('sendmail_path'), 'sendmail')) {
            $this->Sendmail = '/usr/sbin/sendmail';
        }
        $this->Mailer = 'sendmail';
    }

    /**
     * Send messages using qmail.
     * @return void
     */
    public function isQmail()
    {
        if (!stristr(ini_get('sendmail_path'), 'qmail')) {
            $this->Sendmail = '/var/qmail/bin/qmail-inject';
        }
        $this->Mailer = 'qmail';
    }

    /**
     * Add a "To" address.
     * @param string $address
     * @param string $name
     * @return bool true on success, false if address already used
     */
    public function addAddress($address, $name = '')
    {
        return $this->addAnAddress('to', $address, $name);
    }

    /**
     * Add a "CC" address.
     * @note: This function works with the SMTP mailer on win32, not with the "mail" mailer.
     * @param string $address
     * @param string $name
     * @return bool true on success, false if address already used
     */
    public function addCC($address, $name = '')
    {
        return $this->addAnAddress('cc', $address, $name);
    }

    /**
     * Add a "BCC" address.
     * @note: This function works with the SMTP mailer on win32, not with the "mail" mailer.
     * @param string $address
     * @param string $name
     * @return bool true on success, false if address already used
     */
    public function addBCC($address, $name = '')
    {
        return $this->addAnAddress('bcc', $address, $name);
    }

    /**
     * Add a "Reply-to" address.
     * @param string $address
     * @param string $name
     * @return bool
     */
    public function addReplyTo($address, $name = '')
    {
        return $this->addAnAddress('Reply-To', $address, $name);
    }

    /**
     * Add an address to one of the recipient arrays.
     * Addresses that have been added already return false, but do not throw exceptions
     * @param string $kind One of 'to', 'cc', 'bcc', 'ReplyTo'
     * @param string $address The email address to send to
     * @param string $name
     * @throws phpmailerException
     * @return bool true on success, false if address already used or invalid in some way
     * @access protected
     */
    protected function addAnAddress($kind, $address, $name = '')
    {
        if (!preg_match('/^(to|cc|bcc|Reply-To)$/', $kind)) {
            $this->setError($this->lang('Invalid recipient array') . ': ' . $kind);
            $this->edebug($this->lang('Invalid recipient array') . ': ' . $kind);
            if ($this->exceptions) {
                throw new phpmailerException('Invalid recipient array: ' . $kind);
            }
            return false;
        }
        $address = trim($address);
        $name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim
        if (!$this->validateAddress($address)) {
            $this->setError($this->lang('invalid_address') . ': ' . $address);
            $this->edebug($this->lang('invalid_address') . ': ' . $address);
            if ($this->exceptions) {
                throw new phpmailerException($this->lang('invalid_address') . ': ' . $address);
            }
            return false;
        }
        if ($kind != 'Reply-To') {
            if (!isset($this->all_recipients[strtolower($address)])) {
                array_push($this->$kind, array($address, $name));
                $this->all_recipients[strtolower($address)] = true;
                return true;
            }
        } else {
            if (!array_key_exists(strtolower($address), $this->ReplyTo)) {
                $this->ReplyTo[strtolower($address)] = array($address, $name);
                return true;
            }
        }
        return false;
    }

    /**
     * Set the From and FromName properties.
     * @param string $address
     * @param string $name
     * @param bool $auto Whether to also set the Sender address, defaults to true
     * @throws phpmailerException
     * @return bool
     */
    public function setFrom($address, $name = '', $auto = true)
    {
        $address = trim($address);
        $name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim
        if (!$this->validateAddress($address)) {
            $this->setError($this->lang('invalid_address') . ': ' . $address);
            $this->edebug($this->lang('invalid_address') . ': ' . $address);
            if ($this->exceptions) {
                throw new phpmailerException($this->lang('invalid_address') . ': ' . $address);
            }
            return false;
        }
        $this->From = $address;
        $this->FromName = $name;
        if ($auto) {
            if (empty($this->Sender)) {
                $this->Sender = $address;
            }
        }
        return true;
    }

    /**
     * Return the Message-ID header of the last email.
     * Technically this is the value from the last time the headers were created,
     * but it's also the message ID of the last sent message except in
     * pathological cases.
     * @return string
     */
    public function getLastMessageID()
    {
        return $this->lastMessageID;
    }

    /**
     * Check that a string looks like an email address.
     * @param string $address The email address to check
     * @param string $patternselect A selector for the validation pattern to use :
     *   'auto' - pick best one automatically;
     *   'pcre8' - use the squiloople.com pattern, requires PCRE > 8.0, PHP >= 5.3.2, 5.2.14;
     *   'pcre' - use old PCRE implementation;
     *   'php' - use PHP built-in FILTER_VALIDATE_EMAIL; faster, less thorough;
     *   'noregex' - super fast, really dumb.
     * @return bool
     * @static
     * @access public
     */
    public static function validateAddress($address, $patternselect = 'auto')
    {
        if ($patternselect == 'auto') {
            if (defined(
                'PCRE_VERSION'
            )
            ) { //Check this instead of extension_loaded so it works when that function is disabled
                if (version_compare(PCRE_VERSION, '8.0') >= 0) {
                    $patternselect = 'pcre8';
                } else {
                    $patternselect = 'pcre';
                }
            } else {
                //Filter_var appeared in PHP 5.2.0 and does not require the PCRE extension
                if (version_compare(PHP_VERSION, '5.2.0') >= 0) {
                    $patternselect = 'php';
                } else {
                    $patternselect = 'noregex';
                }
            }
        }
        switch ($patternselect) {
            case 'pcre8':
                /**
                 * Conforms to RFC5322: Uses *correct* regex on which FILTER_VALIDATE_EMAIL is
                 * based; So why not use FILTER_VALIDATE_EMAIL? Because it was broken to
                 * not allow a@b type valid addresses :(
                 * @link http://squiloople.com/2009/12/20/email-address-validation/
                 * @copyright 2009-2010 Michael Rushton
                 * Feel free to use and redistribute this code. But please keep this copyright notice.
                 */
                return (bool)preg_match(
                    '/^(?!(?>(?1)"?(?>\\\[ -~]|[^"])"?(?1)){255,})(?!(?>(?1)"?(?>\\\[ -~]|[^"])"?(?1)){65,}@)' .
                    '((?>(?>(?>((?>(?>(?>\x0D\x0A)?[\t ])+|(?>[\t ]*\x0D\x0A)?[\t ]+)?)(\((?>(?2)' .
                    '(?>[\x01-\x08\x0B\x0C\x0E-\'*-\[\]-\x7F]|\\\[\x00-\x7F]|(?3)))*(?2)\)))+(?2))|(?2))?)' .
                    '([!#-\'*+\/-9=?^-~-]+|"(?>(?2)(?>[\x01-\x08\x0B\x0C\x0E-!#-\[\]-\x7F]|\\\[\x00-\x7F]))*' .
                    '(?2)")(?>(?1)\.(?1)(?4))*(?1)@(?!(?1)[a-z0-9-]{64,})(?1)(?>([a-z0-9](?>[a-z0-9-]*[a-z0-9])?)' .
                    '(?>(?1)\.(?!(?1)[a-z0-9-]{64,})(?1)(?5)){0,126}|\[(?:(?>IPv6:(?>([a-f0-9]{1,4})(?>:(?6)){7}' .
                    '|(?!(?:.*[a-f0-9][:\]]){8,})((?6)(?>:(?6)){0,6})?::(?7)?))|(?>(?>IPv6:(?>(?6)(?>:(?6)){5}:' .
                    '|(?!(?:.*[a-f0-9]:){6,})(?8)?::(?>((?6)(?>:(?6)){0,4}):)?))?(25[0-5]|2[0-4][0-9]|1[0-9]{2}' .
                    '|[1-9]?[0-9])(?>\.(?9)){3}))\])(?1)$/isD',
                    $address
                );
                break;
            case 'pcre':
                //An older regex that doesn't need a recent PCRE
                return (bool)preg_match(
                    '/^(?!(?>"?(?>\\\[ -~]|[^"])"?){255,})(?!(?>"?(?>\\\[ -~]|[^"])"?){65,}@)(?>' .
                    '[!#-\'*+\/-9=?^-~-]+|"(?>(?>[\x01-\x08\x0B\x0C\x0E-!#-\[\]-\x7F]|\\\[\x00-\xFF]))*")' .
                    '(?>\.(?>[!#-\'*+\/-9=?^-~-]+|"(?>(?>[\x01-\x08\x0B\x0C\x0E-!#-\[\]-\x7F]|\\\[\x00-\xFF]))*"))*' .
                    '@(?>(?![a-z0-9-]{64,})(?>[a-z0-9](?>[a-z0-9-]*[a-z0-9])?)(?>\.(?![a-z0-9-]{64,})' .
                    '(?>[a-z0-9](?>[a-z0-9-]*[a-z0-9])?)){0,126}|\[(?:(?>IPv6:(?>(?>[a-f0-9]{1,4})(?>:' .
                    '[a-f0-9]{1,4}){7}|(?!(?:.*[a-f0-9][:\]]){8,})(?>[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,6})?' .
                    '::(?>[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,6})?))|(?>(?>IPv6:(?>[a-f0-9]{1,4}(?>:' .
                    '[a-f0-9]{1,4}){5}:|(?!(?:.*[a-f0-9]:){6,})(?>[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,4})?' .
                    '::(?>(?:[a-f0-9]{1,4}(?>:[a-f0-9]{1,4}){0,4}):)?))?(?>25[0-5]|2[0-4][0-9]|1[0-9]{2}' .
                    '|[1-9]?[0-9])(?>\.(?>25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3}))\])$/isD',
                    $address
                );
                break;
            case 'php':
            default:
                return (bool)filter_var($address, FILTER_VALIDATE_EMAIL);
                break;
            case 'noregex':
                //No PCRE! Do something _very_ approximate!
                //Check the address is 3 chars or longer and contains an @ that's not the first or last char
                return (strlen($address) >= 3
                    and strpos($address, '@') >= 1
                    and strpos($address, '@') != strlen($address) - 1);
                break;
        }
    }

    /**
     * Create a message and send it.
     * Uses the sending method specified by $Mailer.
     * @throws phpmailerException
     * @return bool false on error - See the ErrorInfo property for details of the error.
     */
    public function send()
    {
        try {
            if (!$this->preSend()) {
                return false;
            }
            return $this->postSend();
        } catch (phpmailerException $e) {
            $this->mailHeader = '';
            $this->setError($e->getMessage());
            if ($this->exceptions) {
                throw $e;
            }
            return false;
        }
    }

    /**
     * Prepare a message for sending.
     * @throws phpmailerException
     * @return bool
     */
    public function preSend()
    {
        try {
            $this->mailHeader = "";
            if ((count($this->to) + count($this->cc) + count($this->bcc)) < 1) {
                throw new phpmailerException($this->lang('provide_address'), self::STOP_CRITICAL);
            }

            // Set whether the message is multipart/alternative
            if (!empty($this->AltBody)) {
                $this->ContentType = 'multipart/alternative';
            }

            $this->error_count = 0; // reset errors
            $this->setMessageType();
            // Refuse to send an empty message unless we are specifically allowing it
            if (!$this->AllowEmpty and empty($this->Body)) {
                throw new phpmailerException($this->lang('empty_message'), self::STOP_CRITICAL);
            }

            $this->MIMEHeader = $this->createHeader();
            $this->MIMEBody = $this->createBody();

            // To capture the complete message when using mail(), create
            // an extra header list which createHeader() doesn't fold in
            if ($this->Mailer == 'mail') {
                if (count($this->to) > 0) {
                    $this->mailHeader .= $this->addrAppend("To", $this->to);
                } else {
                    $this->mailHeader .= $this->headerLine("To", "undisclosed-recipients:;");
                }
                $this->mailHeader .= $this->headerLine(
                    'Subject',
                    $this->encodeHeader($this->secureHeader(trim($this->Subject)))
                );
            }

            // Sign with DKIM if enabled
            if (!empty($this->DKIM_domain)
                && !empty($this->DKIM_private)
                && !empty($this->DKIM_selector)
                && !empty($this->DKIM_domain)
                && file_exists($this->DKIM_private)) {
                $header_dkim = $this->DKIM_Add(
                    $this->MIMEHeader . $this->mailHeader,
                    $this->encodeHeader($this->secureHeader($this->Subject)),
                    $this->MIMEBody
                );
                $this->MIMEHeader = rtrim($this->MIMEHeader, "\r\n ") . self::CRLF .
                    str_replace("\r\n", "\n", $header_dkim) . self::CRLF;
            }
            return true;

        } catch (phpmailerException $e) {
            $this->setError($e->getMessage());
            if ($this->exceptions) {
                throw $e;
            }
            return false;