Brian Weed wrote:
> The email message format knows if it is a reply or not? Very
interesting.
Indeed. This is what makes http://www.nun.org.uk/threading.png possible.
> I assumed that the only indication that it is a reply is when "RE:" is
> prepended to the subject line by the client.
Nope.
> My client also does not regard my "New Topic" email as part of the same
> thread as the original from which I replied, since it must follow
threads by
> the subject.
Lesser clients do this, because it's a lot easier. However, it destroys
threading information if the subject line is changed, which isn't what
you might want. (For example, I have changed the subject of this
posting so it actually reflects what's being discussed.)
(I use Thunderbird, btw.)