Re: Scope of SMTP Verify

"Peter J. Holzer" <[email protected]> wrote:
> I can think of several items which can be verified at the SMTP level
> (not necessarily in any useful order):
...

  I'm starting to think that the most important question is:

  - Is this machine an MTA which will accept mail, too.
    If not, why am I accepting mail from it?
    Why is it not using it's own MTA to send mail?
    What's wrong with SUBMIT, or SMTP over SSH?

> 1) The identity of the SMTP client. SMTP auth exists, but doesn't seem
>    to be much use between random hosts on the internet (It is useful for
>    authenticating users to their "home MTA").

  That's pretty much IP address.  There isn't much in identifying
umpteen machines with the same software configuration.

> 2) The identity of the sender of a message.

  This has privacy issues.

  Alan DeKok.