Le quartidi 4 floréal, an CCXXIV, The Wanderer a écrit : > If the list software did this modification for _all_ messages, not just > ones from Gmail addresses, I don't see how it would break threading
It breaks it for the *senders*: they would have the message in their "sent" archive with the message-id chosen by the MUA and the rest of the thread connected to the message (in-reply-to and references) with a different message-id. > Interesting. Do you have any evidence for the idea that it uses more > than just Message-ID? I can't prove that it doesn't, but I've never seen > anything that I recall to indicate that it does. A long time ago, I experimented with in-reply-to and references in order to see how gmail decided if a mail belongs in a thread, and my conclusion was that it relied more on the subject field than anything else. It was a long time ago. > For myself, one major reason (not the only one) is that the received > copy is often different from the sent copy - modified message headers > (e.g. by adding List-ID), added mailing-list footer, et cetera. True. A gamil users could check to see if it is possible to obtain that information. I suspect the misfeature belongs in gmail's web interface, actually, and the mails are really present in the archive and accessible through IMAP.
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