On Mon, Oct 26, 2009 at 12:45:12PM +0800, Yao Ziyuan wrote: > The main idea is if a message is considered spam, this spam status > can be tracked by the sender (but not sent to him directly, as the From > field can be faked). Providing useful intelligence about (a particular site's) spam filters to spammers is a seriously bad idea. ---Rsk