” There are a number of promising technical papers under
consideration by the Internet Engineering Task Force which deal
with the ever-growing problem of spam. Most of them seek to attack
the spam problem obliquely rather than head on. These techniques
avoid looking at message content in an attempt to determine if an
email is spam or not. Instead, they focus on authenticating the
sender. Since most spam comes from forged email addresses,
eliminating such forgery would be a big step up in the fight
against spam. In this article we’ll look at the evolution of the
current Sender ID proposals, and we’ll also examine some of the
non-technical barriers which might prevent any of the proposed
solutions from ever working…”