ALBANY, May 26 - As they move to thwart the illegal trade of cigarettes over the Internet, state officials have joined colleagues from around the nation in persuading the major credit card companies to stop processing payments for online cigarette sales. Additionally, the state has enacted a law prohibiting the shipment of cigarettes to its residents and banned private carriers, like FedEx, from shipping cigarettes. But as state officials fight illegal online cigarette sales, one operation is not falling into line - the United States Postal Service, which officials say delivers the bulk of illegally purchased cigarettes to New Yorkers....