Is it really necessary that a single click on the From/Subject/Received/etc. column header changes the sorting? I use it on purpose maybe once a month, and accidentally hit it several times a week, which is getting annoying. How about instead a popup-menu with radio buttons: o No sorting o Ascending o Descending I also tried how it would work if I instead sorted messages so that newest would be at the bottom instead of at the top. Besides somehow seeming weird looking when threading is enabled, the list gets scrolled to top every time a new message arrives while no messages are selected (e.g. I had expunged a message). So that isn't very usable either..
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