Messages which start with "Fwd" are threaded as children of other messages. The message list should only consider messages with "Re" prefix for subject-based threading. To reproduce: 1. Save a simple mail as draft 2. Forward that mail as an attachment. A composer window will open 3. Save that mail as a draft as well 4. Result: The 2 messages a threaded, which is wrong
the "Re" message threading is also somewhat broken, if you're receiving the kde-buildsystem messages, there's a nice example. Message from David from Nov. 15 with subject "KDE/kdelibs/cmake/modules" and an answer from a totally different message but with the same title and CC'ed to this list appears as an answer.
@Thomas: Is that really wrong? I would say that one could argue that both threading and not threading on forwarded messages are correct. @Christophe: Do these messages contain a "In-reply-to: <msg-id>" header?
> @Thomas: Is that really wrong? I would say that one could argue that both > threading and not threading on forwarded messages are correct. I'd say that considering forwarded messages for threading is a bit weird, at least I haven't seen that before. My original instructions to reproduce this bug don't work anymore, so something has changed, therefore closing as WORKSFORME.