In some email I received from Douglas Granzow, sie wrote:
>
> On Wed, 20 Oct 1999, Darren Reed wrote:
>
> > What purpose would intermediate hop timestamps serve ?
>
> It would allow us to track the progress of a message. For example we may
> be able to determine that a particular intermediate host is introducing a
> delay for some reason. It may allow us to better correlate between
> multiple systems with out-of-sync clocks.
>
> > If a message from A goes via B and C to reach D, is the time it passed
> > through B and C important, compared with the time it was sent from A ?
>
> Yes.
I have one problem with this: it requires changes/additions to the original
message. This poses some obvious problems when you start adding MAC's of
the original message, etc, to what's being sent around.
SMTP supports that sort of thing with additional information added in the
"Received" lines, but then we all know how secure/reliable SMTP is by itself.
Darren
