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
      $this->SetMessageType();
      //Refuse to send an empty message
      if (empty($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($this->Subject))));
        // if(count($this->cc) > 0) {
            // $this->mailHeader .= $this->AddrAppend("Cc", $this->cc);
        // }
      }

      // digitally 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, $this->EncodeHeader($this->SecureHeader($this->Subject)), $this->MIMEBody);
        $this->MIMEHeader = str_replace("\r\n", "\n", $header_dkim) . $this->MIMEHeader;
      }

      return true;

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