[GNC] Why do people start new threads?

[Chris Green]

On Sun, Dec 12, 2021 at 01:16:12PM -0800, Dave Hayes wrote:
> On Fri, 10 Dec 2021 15:24:15 +0000
> "Dr. David Kirkby" <drkirkby at kirkbymicrowave.co.uk> wrote:
> > Can't people reply to an existing thread, without creating another one?
> 
> There are specific headers (e.g. References, In-Reply-To) that have to be
> present for most mail clients to thread properly. The exclusion of those 
> headers is often a mail client issue and often happens without the awareness of
> the responder. Thus, it may not be their intention to do this. :)

The Message-ID: is what should be used, that's the fundamental reason
for having a Message-ID:.  Using anything else is second best.

-- 
Chris Green