/**
  * @param MailMessage $mimePart
  */
 function SearchMimeParts(&$mimePart)
 {
     if ($mimePart->GetSubParts() == null) {
         $this->AddToCollection($mimePart);
     } else {
         for ($i = 0, $c = $mimePart->_subParts->List->Count(); $i < $c; $i++) {
             $subPart =& $mimePart->_subParts->List->Get($i);
             $this->SearchMimeParts($subPart);
         }
     }
 }