i use the following filter to get email that contain attachment message, but
the filter is not work.

java code:

FilterEntry gwFE = new FilterEntry();// Instantiate a FilterEntry
gwFE.setField("size");
gwFE.setValue("0");
gwFE.setOp(FilterOp.gt);
gwFilter.setElement(gwFE);// getItemsRequest is called with the filter.

server : groupwise 7.0.3, windows server 2003