hijacking threads

[Amedee Van Gasse (ub)]

On Tue, November 17, 2009 10:21, Colin Law wrote:

> I think what a lot of people do not realise (and it is not obvious to
> those not in the know) that threading is not just a matter of subject
> line.  The thread identification is also included in the headers.
> This means that replying to an existing email, deleting the content,
> and changing the subject line does not fully detach the mail from the
> existing thread (though this does depend on ones mail reader I
> believe).  Therefore when starting a new thread one should always
> start a new email.  I hope I have got my facts right, I am not all
> that knowledgeable in this area myself.

You are absolutely right, Colin.
The relevant headers from your mail are:

In-Reply-To: <1258413819.16964.36.camel at karl>
References: <1258413819.16964.36.camel at karl>

If you want some technical background about how threading actually works,
you should read http://www.jwz.org/doc/threading.html

-- 
Amedee