boundaries

    $emailboundary = md5(time()); // Just something random for the boundary
    $emailboundary = '----=Email_Boundary_'.$emailboundary; // Full boundary
    if(!empty($imagedata['mime']) && !empty($imagedata['name']) && !empty($imagedata['data']))
    {
      $emailheaders .= "\nDate: " . gmdate('D, d M Y H:i:s') . " -0000\nX-Mailer: Lazarus Guestbook\nMIME-Version: 1.0\nContent-type: multipart/mixed;\n   boundary=\"".$emailboundary."\"";
      $emailbody = "\n\nThis is a multi-part message in MIME format.\nIf you are reading this then consider updating your email program.\n\n--".$emailboundary."\nContent-type: multipart/alternative;\n   boundary=\"".$emailboundary."Laz\"\n\n".
      '--'.$emailboundary."Laz\nContent-type: text/plain; charset=".$this->VARS['charset']."; format=flowed\nContent-Transfer-Encoding: 7bit\nContent-Disposition: inline\n\n".
      $this->undo_htmlspecialchars(strip_tags($emailmessage)).
      "\n\n--".$emailboundary."Laz\nContent-type: text/html; charset=".$this->VARS['charset']."\nContent-Transfer-Encoding: 7bit\nContent-Disposition: inline\n\n".
      "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">\n
      <html>\n
      <body>\n".
      $emailmessage.
      "\n</body>\n</html>\n\n--".$emailboundary.
      "Laz--\n\n--".$emailboundary."\nContent-type: ".$imagedata['mime']."; name=\"".$imagedata['name']."\"\n".
      "Content-Transfer-Encoding: base64\nContent-Disposition: attachment; filename=\"".$imagedata['name']."\"\n\n".$imagedata['data'].
      "--".$emailboundary."--\n";;