Microsoft plans to unveil "Caller ID" specs for email at a RSA conference, according to analysis at IDG News Service. Sendmail Inc. also announced impending release of tools for e-mail sender authentication. Authentication of the origin of emails is considered by many to be essential to combat spam, viruses and identity fraud. Source: Microsoft to unveil antispam plans (Internet Business News from The Industry Standard - 2/24/04)
See also Unintended Consequence's Emergence of the Accountable Internet (2/10/04)
and Susan Crawford's The Theory of Everything (2/6/04)