A U.K. group of Internet service providers (ISPs) has taken steps to stop spammers with a new "get tough" antispam policy. The 150 members of the London Internet Exchange (LINX)--which also includes major ISPs from Europe, the United States, and Asia--agreed to target and shut down the sites of "spammers who host their e-commerce Web sites with a reputable ISP while sending spam from another network," according to a release from the group. LINX is also calling on ISPs to shut down Web sites that sell spamming tools including CDs "containing millions of illegally collected e-mail addresses."