From: Jacob <jacob01_at_gmx.net>
Date: Sat, 17 Dec 2005 01:21:49 +0100

Hello,

On Sat, Dec 17, 2005 at 08:25:06AM +1100, ashridah_at_netspace.net.au wrote:
> Quoting Manuel Dejonghe <manuel_at_dejonghe.de>:
>
> > Hi,
> > can't you modify the subject when replying to a mail ?
>
> Email's a little more complicated than that.
>
> The same subject doesn't determine the thread perfectly, you really need to also
> include a header along the lines of
> References: <wallis1000000$194.82.45.24$.002801c60234$caf13c40$a202020a_at_oem9>
> which is based on the
> Message-ID: <9e4313e10512160345q2dd6e27exac27af963b64c6ea_at_mail.gmail.com>
> header from the email you're replying to (and possibly, other references, I
> don't remember exactly).
>

Like Jochen wrote, it's rather the In-Reply-To header.

Let's look into RFC822 ("standard for the format of arpa internet text
messages", 1982) for the difference:

     4.6.2. IN-REPLY-TO

             The contents of this field identify previous correspon-
        dence which this message answers. [...]

     4.6.3. REFERENCES

             The contents of this field identify other correspondence
        which this message references. [...]


Jacob
Received on 2005-12-17