[Mimedefang] Checking for a valid sender

[David F. Skoll]

On Tue, 18 Nov 2003, Alan Madill wrote:

> The reason that we have a spam problem to begin with is the SMTP
> protocol wasn't designed to deal with it.  What is needed is a new
> protocol or an extension to SMTP that does...

That's beyond the scope of MIMEDefang, unfortunately.

> Verify that the sender is real.  (there goes 90% of your spam).

There are many problems with this, such as privacy issues, problems
with .forward files, problems with mailing lists, etc.  I think there
are legitimate circumstances under which I should be able to e-mail
someone more-or-less anonymously.

Regards,

David.