In article
<qAuIa.14092$3o3.1016462@bgtnsc05-news.ops.worldnet.att.net>,
"Charles Flink" <cwf@worldnet.att.net> wrote:

But given the unauthenticated nature of SMTP, there is no such thing as
a "trustworthy" From address. That's how Klez.H was able to spread so
far and so fast--because so many messages looked like they came from
people you knew.