A group of U.S.-based Internet service providers (ISPs) have announced that they are going to start charging their email users for processing the spam that is addressed to them. As the deluge of spam continues unabated, ISPs are seeking new ways to help offset the cost of processing the trillions of pieces of junk email that they are keeping out of their customers’ inboxes (or, in some cases, still delivering to their customers’ inbox or junk folder).