Zend_Mail::send PHP Method

    public function send($transport = null)
    {
        if ($transport === null) {
            if (!self::$_defaultTransport instanceof Zend_Mail_Transport_Abstract) {
                require_once 'Zend/Mail/Transport/Sendmail.php';
                $transport = new Zend_Mail_Transport_Sendmail();
            } else {
                $transport = self::$_defaultTransport;
            }
        }
        if ($this->_date === null) {
            $this->setDate();
        }
        if (null === $this->_from && null !== self::getDefaultFrom()) {
            $this->setFromToDefaultFrom();
        }
        if (null === $this->_replyTo && null !== self::getDefaultReplyTo()) {
            $this->setReplyToFromDefault();
        }
        $transport->send($this);
        return $this;
    }

 protected function _sendEmail($history)
 {
     ini_set('SMTP', Mage::getStoreConfig('system/smtp/host'));
     ini_set('smtp_port', Mage::getStoreConfig('system/smtp/port'));
     $mail = new Zend_Mail('utf-8');
     $mail->addTo($history->getEmail());
     $mail->setBodyHTML($history->getBody());
     $mail->setSubject('=?utf-8?B?' . base64_encode($history->getSubject()) . '?=');
     $senderName = Mage::getStoreConfig(self::NAME_XML_PATH, $history->getStoreId());
     //Mage::getStoreConfig('trans_email/ident_general/name');
     $senderEmail = Mage::getStoreConfig(self::EMAIL_XML_PATH, $history->getStoreId());
     //Mage::getStoreConfig('trans_email/ident_general/email');
     $cc = Mage::getStoreConfig(self::CC_XML_PATH, $history->getStoreId());
     $mail->addCc($cc);
     $mail->setFrom($senderEmail, $senderName);
     try {
         if ((string) Mage::getConfig()->getNode('modules/Aschroder_SMTPPro/active') == 'true') {
             $transport = Mage::helper('smtppro')->getTransport();
             $mail->send($transport);
         } else {
             $mail->send();
         }
     } catch (Exception $e) {
         Mage::logException($e);
         return false;
     }
     return true;
 }