Please do not use Reply-To unless it's really a reply

To all posters:

Please, when posting to this list, do not use your mailer's Reply-To 
button unless you're really posting a reply to a previous message. 
Otherwise, this messes up the way OS X Mail organizes messages in 
threads.

For example, Mail considers "Linguists' trees and pdf" and "Referring 
to arbitrary labels?" as one single thread, because the first message 
in "Referring to arbitrary labels?" was created as a reply to a message 
from "Linguists' trees and pdf". If you look at the full headers from 
this first message, you'll see that they contain:

        In-reply-to: 
<3E7909C1-3966-11D9-9BA3-000393767702-lfQs2E/hpTzJe1Tn9oUdOze48wsgrGvP@xxxxxxxxxxxxxxxx>

which apparently is used by OS X Mail to identify this message as a 
part from the other thread.

This is a limitation of OS X Mail, obviously (I've not tested the same 
in Thunderbird or Mozilla Mail yet), but for the moment we have to live 
with it.

Bruno Voisin

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