PHPMailer.php

<?php

// @codingStandardsIgnoreFile

/*~ class.phpmailer.php
Orginal release information:
.---------------------------------------------------------------------------.
|  Software: PHPMailer - PHP email class                                    |
|   Version: 5.1                                                            |
|   Contact: via sourceforge.net support pages (also www.worxware.com)      |
|      Info: http://phpmailer.sourceforge.net                               |
|   Support: http://sourceforge.net/projects/phpmailer/                     |
| ------------------------------------------------------------------------- |
|     Admin: Andy Prevost (project admininistrator)                         |
|   Authors: Andy Prevost (codeworxtech) codeworxtech@users.sourceforge.net |
|          : Marcus Bointon (coolbru) coolbru@users.sourceforge.net         |
|   Founder: Brent R. Matzelle (original founder)                           |
| Copyright (c) 2004-2009, Andy Prevost. All Rights Reserved.               |
| Copyright (c) 2001-2003, Brent R. Matzelle                                |
| ------------------------------------------------------------------------- |
|   License: Distributed under the Lesser General Public License (LGPL)     |
|            http://www.gnu.org/copyleft/lesser.html                        |
| 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.                                         |
| ------------------------------------------------------------------------- |
| We offer a number of paid services (www.worxware.com):                    |
| - Web Hosting on highly optimized fast and secure servers                 |
| - Technology Consulting                                                   |
| - Oursourcing (highly qualified programmers and graphic designers)        |
'---------------------------------------------------------------------------'
*/

namespace Drupal\smtp\PHPMailer;

use Drupal\smtp\PHPMailer\SMTP;
use Drupal\smtp\Exception\PHPMailerException;

/**
 * PHPMailer - PHP email transport class
 * NOTE: Requires PHP version 5 or later
 * @package PHPMailer
 * @author Andy Prevost
 * @author Marcus Bointon
 * @copyright 2004 - 2009 Andy Prevost
 */

class PHPMailer {

  /////////////////////////////////////////////////
  // PROPERTIES, PUBLIC
  /////////////////////////////////////////////////

  /**
   * Email priority (1 = High, 3 = Normal, 5 = low).
   * @var int
   */
  public $Priority          = 3;

  /**
   * Sets the CharSet of the message.
   * @var string
   */
  public $CharSet           = 'iso-8859-1';

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

  /**
   * Sets the Encoding of the message. Options for this are
   *  "8bit", "7bit", "binary", "base64", and "quoted-printable".
   * @var string
   */
  public $Encoding          = '8bit';

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

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

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

  /**
   * Sets 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.
   * @var string
   */
  public $Sender            = '';

  /**
   * Sets the Subject of the message.
   * @var string
   */
  public $Subject           = '';

  /**
   * Sets the Body of the message.  This can be either an HTML or text body.
   * If HTML then run IsHTML(TRUE).
   * @var string
   */
  public $Body              = '';

  /**
   * Sets the text-only body of the message.  This automatically sets the
   * email to multipart/alternative.  This body can be read by mail
   * clients that do not have HTML email capability such as mutt. Clients
   * that can read HTML will view the normal Body.
   * @var string
   */
  public $AltBody           = '';

  /**
   * Sets word wrapping on the body of the message to a given number of
   * characters.
   * @var int
   */
  public $WordWrap          = 0;

  /**
   * Method to send mail: ("mail", "sendmail", or "smtp").
   * @var string
   */
  public $Mailer            = 'mail';

  /**
   * Sets the path of the sendmail program.
   * @var string
   */
  public $Sendmail          = '/usr/sbin/sendmail';

  /**
   * Path to PHPMailer plugins.  Useful if the SMTP class
   * is in a different directory than the PHP include path.
   * @var string
   */
  public $PluginDir         = '';

  /**
   * Sets the email address that a reading confirmation will be sent.
   * @var string
   */
  public $ConfirmReadingTo  = '';

  /**
   * Sets 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'.
   * @var string
   */
  public $Hostname          = '';

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

  /////////////////////////////////////////////////
  // PROPERTIES FOR SMTP
  /////////////////////////////////////////////////

  /**
   * Sets the SMTP hosts.  All hosts must be separated by a
   * semicolon.  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.
   * @var string
   */
  public $Host          = 'localhost';

  /**
   * Sets the default SMTP server port.
   * @var int
   */
  public $Port          = 25;

  /**
   * Sets the SMTP HELO of the message (Default is $Hostname).
   * @var string
   */
  public $Helo          = '';

  /**
   * Sets connection prefix.
   * Options are "", "ssl" or "tls"
   * @var string
   */
  public $SMTPSecure    = '';

  /**
   * Sets SMTP authentication. Utilizes the Username and Password variables.
   * @var bool
   */
  public $SMTPAuth      = FALSE;

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

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

  /**
   * Sets the SMTP server timeout in seconds.
   * This function will not work with the win32 version.
   * @var int
   */
  public $Timeout       = 10;

  /**
   * Sets SMTP class debugging on or off.
   * @var bool
   */
  public $SMTPDebug     = FALSE;

  /**
   * Prevents the SMTP connection from being closed after each mail
   * sending.  If this is set to TRUE then to close the connection
   * requires an explicit call to SmtpClose().
   * @var bool
   */
  public $SMTPKeepAlive = FALSE;

  /**
   * Provides the ability to have the TO field process individual
   * emails, instead of sending to entire TO addresses
   * @var bool
   */
  public $SingleTo      = FALSE;

   /**
   * If SingleTo is TRUE, this provides the array to hold the email addresses
   * @var bool
   */
  public $SingleToArray = array();

 /**
   * Provides the ability to change the line ending
   * @var string
   */
  public $LE              = "\n";

  /**
   * Used with DKIM DNS Resource Record
   * @var string
   */
  public $DKIM_selector   = 'phpmailer';

  /**
   * Used with DKIM DNS Resource Record
   * optional, in format of email address 'you@yourdomain.com'
   * @var string
   */
  public $DKIM_identity   = '';

  /**
   * Used with DKIM DNS Resource Record
   * optional, in format of email address 'you@yourdomain.com'
   * @var string
   */
  public $DKIM_domain     = '';

  /**
   * Used with DKIM DNS Resource Record
   * optional, in format of email address 'you@yourdomain.com'
   * @var string
   */
  public $DKIM_private    = '';

  /**
   * Callback Action function name
   * the function that handles the result of the send email action. 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
   * @var string
   */
  public $action_function = ''; //'callbackAction';

  /**
   * Sets the PHPMailer Version number
   * @var string
   */
  public $Version         = '5.1';

  /////////////////////////////////////////////////
  // PROPERTIES, PRIVATE AND PROTECTED
  /////////////////////////////////////////////////

  private   $smtp           = NULL;
  private   $to             = array();
  private   $cc             = array();
  private   $bcc            = array();
  private   $ReplyTo        = array();
  private   $all_recipients = array();
  private   $attachment     = array();
  private   $CustomHeader   = array();
  private   $message_type   = '';
  private   $boundary       = array();
  private   $error_count    = 0;
  private   $sign_cert_file = "";
  private   $sign_key_file  = "";
  private   $sign_key_pass  = "";
  private   $exceptions     = FALSE;

  /////////////////////////////////////////////////
  // CONSTANTS
  /////////////////////////////////////////////////

  const STOP_MESSAGE  = 0; // message only, continue processing
  const STOP_CONTINUE = 1; // message?, likely ok to continue processing
  const STOP_CRITICAL = 2; // message, plus full stop, critical error reached

  /////////////////////////////////////////////////
  // METHODS, VARIABLES
  /////////////////////////////////////////////////

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

  /**
   * Sets message type to HTML.
   * @param bool $ishtml
   * @return void
   */
  public function IsHTML($ishtml = TRUE) {
    if ($ishtml) {
      $this->ContentType = $this->is_html = 'text/html';
    }
    else {
      $this->ContentType = $this->is_html = 'text/plain';
    }
  }

  /**
   * Sets Mailer to send message using SMTP.
   * @return void
   */
  public function IsSMTP() {
    $this->Mailer = 'smtp';
  }

  /**
   * Sets Mailer to send message using PHP mail() function.
   * @return void
   */
  public function IsMail() {
    $this->Mailer = 'mail';
  }

  /**
   * Sets Mailer to send message using the $Sendmail program.
   * @return void
   */
  public function IsSendmail() {
    if (!stristr(ini_get('sendmail_path'), 'sendmail')) {
      $this->Sendmail = '/var/qmail/bin/sendmail';
    }
    $this->Mailer = 'sendmail';
  }

  /**
   * Sets Mailer to send message using the qmail MTA.
   * @return void
   */
  public function IsQmail() {
    if (stristr(ini_get('sendmail_path'), 'qmail')) {
      $this->Sendmail = '/var/qmail/bin/sendmail';
    }
    $this->Mailer = 'sendmail';
  }

  /////////////////////////////////////////////////
  // METHODS, RECIPIENTS
  /////////////////////////////////////////////////

  /**
   * Adds a "To" address.
   * @param string $address
   * @param string $name
   * @return boolean TRUE on success, FALSE if address already used
   */
  public function AddAddress($address, $name = '') {
    return $this->AddAnAddress('to', $address, $name);
  }

  /**
   * Adds a "Cc" address.
   * Note: this function works with the SMTP mailer on win32, not with the "mail" mailer.
   * @param string $address
   * @param string $name
   * @return boolean TRUE on success, FALSE if address already used
   */
  public function AddCC($address, $name = '') {
    return $this->AddAnAddress('cc', $address, $name);
  }

  /**
   * Adds a "Bcc" address.
   * Note: this function works with the SMTP mailer on win32, not with the "mail" mailer.
   * @param string $address
   * @param string $name
   * @return boolean TRUE on success, FALSE if address already used
   */
  public function AddBCC($address, $name = '') {
    return $this->AddAnAddress('bcc', $address, $name);
  }

  /**
   * Adds a "Reply-to" address.
   * @param string $address
   * @param string $name
   * @return boolean
   */
  public function AddReplyTo($address, $name = '') {
    return $this->AddAnAddress('ReplyTo', $address, $name);
  }

  /**
   * Adds 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 $name
   * @return boolean TRUE on success, FALSE if address already used or invalid in some way
   * @access private
   */
  private function AddAnAddress($kind, $address, $name = '') {
    if (!preg_match('/^(to|cc|bcc|ReplyTo)$/', $kind)) {
      echo 'Invalid recipient array: ' . kind;
      return FALSE;
    }
    $address = trim($address);
    $name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim
    if (!self::ValidateAddress($address)) {
      $invalidAddress = t('Invalid address: @address', ['address' => $address]);
      $this->SetError($invalidAddress);
      if ($this->exceptions) {
        throw new PHPMailerException($invalidAddress);
      }
      echo $invalidAddress;
      return FALSE;
    }
    if ($kind != 'ReplyTo') {
      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 $name
 * @return boolean
 */
  public function SetFrom($address, $name = '', $auto=1) {
    $address = trim($address);
    $name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim
    if (!self::ValidateAddress($address)) {
      $invalidAddress = t('Invalid address: @address', ['address' => $address]);
      $this->SetError($invalidAddress);
      if ($this->exceptions) {
        throw new PHPMailerException($invalidAddress);
      }
      echo $invalidAddress;
      return FALSE;
    }
    $this->From = $address;
    $this->FromName = $name;
    if ($auto) {
      if (empty($this->ReplyTo)) {
        $this->AddAnAddress('ReplyTo', $address, $name);
      }
      if (empty($this->Sender)) {
        $this->Sender = $address;
      }
    }
    return TRUE;
  }

  /**
   * Check that a string looks roughly like an email address should
   * Static so it can be used without instantiation
   * Tries to use PHP built-in validator in the filter extension (from PHP 5.2), falls back to a reasonably competent regex validator
   * Conforms approximately to RFC2822
   * @link http://www.hexillion.com/samples/#Regex Original pattern found here
   * @param string $address The email address to check
   * @return boolean
   * @static
   * @access public
   */
  public static function ValidateAddress($address) {
    if (function_exists('filter_var')) { //Introduced in PHP 5.2
      if (filter_var($address, FILTER_VALIDATE_EMAIL) === FALSE) {
        return FALSE;
      }
      else {
        return TRUE;
      }
    }
    else {
      return preg_match('/^(?:[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+\.)*[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+@(?:(?:(?:[a-zA-Z0-9_](?:[a-zA-Z0-9_\-](?!\.)){0,61}[a-zA-Z0-9_-]?\.)+[a-zA-Z0-9_](?:[a-zA-Z0-9_\-](?!$)){0,61}[a-zA-Z0-9_]?)|(?:\[(?:(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\.){3}(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\]))$/', $address);
    }
  }

  /////////////////////////////////////////////////
  // METHODS, MAIL SENDING
  /////////////////////////////////////////////////

  /**
   * Creates message and assigns Mailer. If the message is
   * not sent successfully then it returns FALSE.  Use the ErrorInfo
   * variable to view description of the error.
   * @return bool
   */
  public function Send() {
    try {
      if ((count($this->to) + count($this->cc) + count($this->bcc)) < 1) {
        throw new PHPMailerException(t('You must provide at least one recipient email 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();
      $header = $this->CreateHeader();
      $body = $this->CreateBody();

      if (empty($this->Body)) {
        throw new PHPMailerException(t('Message body empty'), self::STOP_CRITICAL);
      }

      // digitally sign with DKIM if enabled
      if ($this->DKIM_domain && $this->DKIM_private) {
        $header_dkim = $this->DKIM_Add($header, $this->Subject, $body);
        $header = str_replace("\r\n", "\n", $header_dkim) . $header;
      }

      // Choose the mailer and send through it
      switch ($this->Mailer) {
        case 'sendmail':
          return $this->SendmailSend($header, $body);
        case 'smtp':
          return $this->SmtpSend($header, $body);
        default:
          return $this->MailSend($header, $body);
      }

    } catch (PHPMailerException $e) {
      $this->SetError($e->getMessage());
      if ($this->exceptions) {
        throw $e;
      }
      echo $e->getMessage() . "\n";
      return FALSE;
    }
  }

  /**
   * Sends mail using the $Sendmail program.
   * @param string $header The message headers
   * @param string $body The message body
   * @access protected
   * @return bool
   */
  protected function SendmailSend($header, $body) {
    if ($this->Sender != '') {
      $sendmail = sprintf("%s -oi -f %s -t", escapeshellcmd($this->Sendmail), escapeshellarg($this->Sender));
    }
    else {
      $sendmail = sprintf("%s -oi -t", escapeshellcmd($this->Sendmail));
    }
    if ($this->SingleTo === TRUE) {
      foreach ($this->SingleToArray as $key => $val) {
        if (!@$mail = popen($sendmail, 'w')) {
          throw new PHPMailerException(t('Could not execute: @smail', array('@smail' => $this->Sendmail)), self::STOP_CRITICAL);
        }
        fputs($mail, "To: " . $val . "\n");
        fputs($mail, $header);
        fputs($mail, $body);
        $result = pclose($mail);
        // implement call back function if it exists
        $isSent = ($result == 0) ? 1 : 0;
        $this->doCallback($isSent, $val, $this->cc, $this->bcc, $this->Subject, $body);
        if ($result != 0) {
          throw new PHPMailerException(t('Could not execute: @smail', array('@smail' => $this->Sendmail)), self::STOP_CRITICAL);
        }
      }
    }
    else {
      if (!@$mail = popen($sendmail, 'w')) {
        throw new PHPMailerException(t('Could not execute: @smail', array('@smail' => $this->Sendmail)), self::STOP_CRITICAL);
      }
      fputs($mail, $header);
      fputs($mail, $body);
      $result = pclose($mail);
      // implement call back function if it exists
      $isSent = ($result == 0) ? 1 : 0;
      $this->doCallback($isSent, $this->to, $this->cc, $this->bcc, $this->Subject, $body);
      if ($result != 0) {
        throw new PHPMailerException(t('Could not execute: @smail', array('@smail' => $this->Sendmail)), self::STOP_CRITICAL);
      }
    }
    return TRUE;
  }

  /**
   * Sends mail using the PHP mail() function.
   * @param string $header The message headers
   * @param string $body The message body
   * @access protected
   * @return bool
   */
  protected function MailSend($header, $body) {
    $toArr = array();
    foreach ($this->to as $t) {
      $toArr[] = $this->AddrFormat($t);
    }
    $to = implode(', ', $toArr);

    $params = sprintf("-oi -f %s", $this->Sender);
    if ($this->Sender != '' && strlen(ini_get('safe_mode'))< 1) {
      $old_from = ini_get('sendmail_from');
      ini_set('sendmail_from', $this->Sender);
      if ($this->SingleTo === TRUE && count($toArr) > 1) {
        foreach ($toArr as $key => $val) {
          $rt = @mail($val, $this->EncodeHeader($this->SecureHeader($this->Subject)), $body, $header, $params);
          // implement call back function if it exists
          $isSent = ($rt == 1) ? 1 : 0;
          $this->doCallback($isSent, $val, $this->cc, $this->bcc, $this->Subject, $body);
        }
      }
      else {
        $rt = @mail($to, $this->EncodeHeader($this->SecureHeader($this->Subject)), $body, $header, $params);
        // implement call back function if it exists
        $isSent = ($rt == 1) ? 1 : 0;
        $this->doCallback($isSent, $to, $this->cc, $this->bcc, $this->Subject, $body);
      }
    }
    else {
      if ($this->SingleTo === TRUE && count($toArr) > 1) {
        foreach ($toArr as $key => $val) {
          $rt = @mail($val, $this->EncodeHeader($this->SecureHeader($this->Subject)), $body, $header, $params);
          // implement call back function if it exists
          $isSent = ($rt == 1) ? 1 : 0;
          $this->doCallback($isSent, $val, $this->cc, $this->bcc, $this->Subject, $body);
        }
      }
      else {
        $rt = @mail($to, $this->EncodeHeader($this->SecureHeader($this->Subject)), $body, $header);
        // implement call back function if it exists
        $isSent = ($rt == 1) ? 1 : 0;
        $this->doCallback($isSent, $to, $this->cc, $this->bcc, $this->Subject, $body);
      }
    }
    if (isset($old_from)) {
      ini_set('sendmail_from', $old_from);
    }
    if (!$rt) {
      throw new PHPMailerException(t('Could not instantiate mail function.'), self::STOP_CRITICAL);
    }
    return TRUE;
  }

  /**
   * Sends mail via SMTP using PhpSMTP
   * Returns FALSE if there is a bad MAIL FROM, RCPT, or DATA input.
   * @param string $header The message headers
   * @param string $body The message body
   * @uses SMTP
   * @access protected
   * @return bool
   */
  protected function SmtpSend($header, $body) {
    $bad_rcpt = array();

    if (!$this->SmtpConnect()) {
      throw new PHPMailerException(t('SMTP Error: Could not connect to SMTP host.'), self::STOP_CRITICAL);
    }
    $smtp_from = ($this->Sender == '') ? $this->From : $this->Sender;
    if (!$this->smtp->Mail($smtp_from)) {
      throw new PHPMailerException(t('The following From address failed: @from', array('@from' => $smtp_from)), self::STOP_CRITICAL);
    }

    // Attempt to send attach all recipients
    foreach ($this->to as $to) {
      if (!$this->smtp->Recipient($to[0])) {
        $bad_rcpt[] = $to[0];
        // implement call back function if it exists
        $isSent = 0;
        $this->doCallback($isSent, $to[0], '', '', $this->Subject, $body);
      }
      else {
        // implement call back function if it exists
        $isSent = 1;
        $this->doCallback($isSent, $to[0], '', '', $this->Subject, $body);
      }
    }
    foreach ($this->cc as $cc) {
      if (!$this->smtp->Recipient($cc[0])) {
        $bad_rcpt[] = $cc[0];
        // implement call back function if it exists
        $isSent = 0;
        $this->doCallback($isSent, '', $cc[0], '', $this->Subject, $body);
      }
      else {
        // implement call back function if it exists
        $isSent = 1;
        $this->doCallback($isSent, '', $cc[0], '', $this->Subject, $body);
      }
    }
    foreach ($this->bcc as $bcc) {
      if (!$this->smtp->Recipient($bcc[0])) {
        $bad_rcpt[] = $bcc[0];
        // implement call back function if it exists
        $isSent = 0;
        $this->doCallback($isSent, '', '', $bcc[0], $this->Subject, $body);
      }
      else {
        // implement call back function if it exists
        $isSent = 1;
        $this->doCallback($isSent, '', '', $bcc[0], $this->Subject, $body);
      }
    }


    if (count($bad_rcpt) > 0 ) { //Create error message for any bad addresses
      $badaddresses = implode(', ', $bad_rcpt);
      throw new PHPMailerException(t('SMTP Error: The following recipients failed: @bad', array('@bad' => $badaddresses)));
    }
    if (!$this->smtp->Data($header . $body)) {
      throw new PHPMailerException(t('SMTP Error: Data not accepted.'), self::STOP_CRITICAL);
    }
    if ($this->SMTPKeepAlive == TRUE) {
      $this->smtp->Reset();
    }
    return TRUE;
  }

  /**
   * Initiates a connection to an SMTP server.
   * Returns FALSE if the operation failed.
   * @uses SMTP
   * @access public
   * @return bool
   */
  public function SmtpConnect() {
    if (is_null($this->smtp)) {
      $this->smtp = new SMTP();
    }

    $this->smtp->do_debug = $this->SMTPDebug;
    $hosts = explode(';', $this->Host);
    $index = 0;
    $connection = $this->smtp->Connected();

    // Retry while there is no connection
    try {
      while ($index < count($hosts) && !$connection) {
        $hostinfo = array();
        if (preg_match('/^(.+):([0-9]+)$/', $hosts[$index], $hostinfo)) {
          $host = $hostinfo[1];
          $port = $hostinfo[2];
        }
        else {
          $host = $hosts[$index];
          $port = $this->Port;
        }

        $tls = ($this->SMTPSecure == 'tls');
        $ssl = ($this->SMTPSecure == 'ssl');

        if ($this->smtp->Connect(($ssl ? 'ssl://':'') . $host, $port, $this->Timeout)) {

          $hello = ($this->Helo != '' ? $this->Helo : $this->ServerHostname());
          $this->smtp->Hello($hello);

          if ($tls) {
            if (!$this->smtp->StartTLS()) {
              throw new PHPMailerException(t('StartTLS not supported by server or could not initiate session.'));
            }

            //We must resend HELO after tls negotiation
            $this->smtp->Hello($hello);
          }

          $connection = TRUE;
          if ($this->SMTPAuth) {
            if (!$this->smtp->Authenticate($this->Username, $this->Password)) {
              throw new PHPMailerException(t('SMTP Error: Could not authenticate.'));
            }
          }
        }
        $index++;
        if (!$connection) {
          throw new PHPMailerException(t('SMTP Error: Could not connect to SMTP host.'));
        }
      }
    } catch (PHPMailerException $e) {
      $this->smtp->Reset();
      throw $e;
    }
    return TRUE;
  }

  /**
   * Closes the active SMTP session if one exists.
   * @return void
   */
  public function SmtpClose() {
    if (!is_null($this->smtp)) {
      if ($this->smtp->Connected()) {
        $this->smtp->Quit();
        $this->smtp->Close();
      }
    }
  }

  /////////////////////////////////////////////////
  // METHODS, MESSAGE CREATION
  /////////////////////////////////////////////////

  /**
   * Creates recipient headers.
   * @access public
   * @return string
   */
  public function AddrAppend($type, $addr) {
    $addr_str = $type . ': ';
    $addresses = array();
    foreach ($addr as $a) {
      $addresses[] = $this->AddrFormat($a);
    }
    $addr_str .= implode(', ', $addresses);
    $addr_str .= $this->LE;

    return $addr_str;
  }

  /**
   * Formats an address correctly.
   * @access public
   * @return string
   */
  public function AddrFormat($addr) {
    if (empty($addr[1])) {
      return $this->SecureHeader($addr[0]);
    }
    else {
      return $this->EncodeHeader($this->SecureHeader($addr[1]), 'phrase') . " <" . $this->SecureHeader($addr[0]) . ">";
    }
  }

  /**
   * Wraps message for use with mailers that do not
   * automatically perform wrapping and for quoted-printable.
   * Original written by philippe.
   * @param string $message The message to wrap
   * @param integer $length The line length to wrap to
   * @param boolean $qp_mode Whether to run in Quoted-Printable mode
   * @access public
   * @return string
   */
  public function WrapText($message, $length, $qp_mode = FALSE) {
    $soft_break = ($qp_mode) ? sprintf(" =%s", $this->LE) : $this->LE;
    // If utf-8 encoding is used, we will need to make sure we don't
    // split multibyte characters when we wrap
    $is_utf8 = (strtolower($this->CharSet) == "utf-8");

    $message = $this->FixEOL($message);
    if (substr($message, -1) == $this->LE) {
      $message = substr($message, 0, -1);
    }

    $line = explode($this->LE, $message);
    $message = '';
    for ($i=0 ;$i < count($line); $i++) {
      $line_part = explode(' ', $line[$i]);
      $buf = '';
      for ($e = 0; $e<count($line_part); $e++) {
        $word = $line_part[$e];
        if ($qp_mode and (strlen($word) > $length)) {
          $space_left = $length - strlen($buf) - 1;
          if ($e != 0) {
            if ($space_left > 20) {
              $len = $space_left;
              if ($is_utf8) {
                $len = $this->UTF8CharBoundary($word, $len);
              }
              elseif (substr($word, $len - 1, 1) == "=") {
                $len--;
              }
              elseif (substr($word, $len - 2, 1) == "=") {
                $len -= 2;
              }
              $part = substr($word, 0, $len);
              $word = substr($word, $len);
              $buf .= ' ' . $part;
              $message .= $buf . sprintf("=%s", $this->LE);
            }
            else {
              $message .= $buf . $soft_break;
            }
            $buf = '';
          }
          while (strlen($word) > 0) {
            $len = $length;
            if ($is_utf8) {
              $len = $this->UTF8CharBoundary($word, $len);
            }
            elseif (substr($word, $len - 1, 1) == "=") {
              $len--;
            }
            elseif (substr($word, $len - 2, 1) == "=") {
              $len -= 2;
            }
            $part = substr($word, 0, $len);
            $word = substr($word, $len);

            if (strlen($word) > 0) {
              $message .= $part . sprintf("=%s", $this->LE);
            }
            else {
              $buf = $part;
            }
          }
        }
        else {
          $buf_o = $buf;
          $buf .= ($e == 0) ? $word : (' ' . $word);

          if (strlen($buf) > $length and $buf_o != '') {
            $message .= $buf_o . $soft_break;
            $buf = $word;
          }
        }
      }
      $message .= $buf . $this->LE;
    }

    return $message;
  }

  /**
   * Finds last character boundary prior to maxLength in a utf-8
   * quoted (printable) encoded string.
   * Original written by Colin Brown.
   * @access public
   * @param string $encodedText utf-8 QP text
   * @param int    $maxLength   find last character boundary prior to this length
   * @return int
   */
  public function UTF8CharBoundary($encodedText, $maxLength) {
    $foundSplitPos = FALSE;
    $lookBack = 3;
    while (!$foundSplitPos) {
      $lastChunk = substr($encodedText, $maxLength - $lookBack, $lookBack);
      $encodedCharPos = strpos($lastChunk, "=");