docs: private String getConent(Part bp) throws MessagingException {
  	InputStream is = null;
  
  	try {
  	    return getContent(is = bp.getInputStream(), CharsetUtil.toCharset(getCharsetFromContentType(bp.getContentType())));
  	}
  	catch (IOException mie) {
  	    IOUtil.closeEL(is);
  	    try {
  		return getContent(is = bp.getInputStream(), SystemUtil.getCharset());
  	    }
  	    catch (IOException e) {
  		return "Can't read body of this message:" + e.getMessage();
  	    }
  	}
  	finally {
  	    IOUtil.closeEL(is);
  	}
      }