On Thu, 10 Dec 2009 13:30:13 -0800, Carl Worth <cworth@cworth.org> wrote: > But I still have a hard time justifying user operations to manipulate > threading. The whole point of threading is to make it faster to process > and read messages. But manual operations like joining and splitting > threads seem like the user just doing more work, and that *after* having > read the messages. So that seems mostly backwards to me. By the way, Outlook & Exchange suck (or at least some versions do), and don't seem to generate In-Reply-To and References: headers. Just got a mail which prompted me to write this mail. I'd really like to be able to join messages in a case like this. -- - Marten