In article <4E319B13.8000000@xxxxxxxxxxxx>,
John R Pierce <pierce@xxxxxxxxxxxx> wrote:
> On 07/28/11 8:52 AM, Karanbir Singh wrote:
> > the thing is that not all mail clients will set the in-reply-to headers,
> > whuch is why clients like thunderbird, evolution and mutt will use the
> > subject line as well to thread messages.
>
> Its the "References:" header that controls threading in mail clients
> that support it. I'm using thunderbird, and afaik, it won't revert to
> Subject based pseudo threading in the absence of References. Subject
> line changes don't break the thread, which is why using 'reply' and
> changing the subject to start a new thread makes a mess wherre the new
> thread is buried in the original that it was in reply to....
References: is for Usenet news, not email. Email uses In-Reply-To.
In fact, on my local server, mail messages from the centos list are
fed through a filter that changes In-Reply-To to References and then
fed into my local INN news server, so I can read it with a threaded
news reader instead of a mail program. The group is set to be moderated,
so when I post, it gets emailed to the list address. Before doing so,
it goes through another filter that changes the References: header
back to an In-Reply-To with the mode recent message-ID.
Cheers
Tony
--
Tony Mountifield
Work: tony@xxxxxxxxxxxxx - http://www.softins.co.uk
Play: tony@xxxxxxxxxxxxxxx - http://tony.mountifield.org
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