From: "Loren Wilton" <[EMAIL PROTECTED]> > > I don't see the advantage of this. How does a *message header* help in > > tracking? Or does it correspond with a web bug? > > List washing. When they actually get a complaint about spam, they can > remove the address from the list, even if the report is something like > Spamcop that attempts to remove any identification of the complaint sender.
The basic problem with list washing is that in the hands of a spammer it is "address confirmation." {^_^}