The vertical scrollbar is always visible in the folder list, even when the folder list does not reach the end of the window.
Look for 'folderview_vscrollbar_policy' here: http://www.claws-mail.org/manual/claws-mail-manual.html#adv_hidden
(In reply to comment #1) > Look for 'folderview_vscrollbar_policy' here: > http://www.claws-mail.org/manual/claws-mail-manual.html#adv_hidden I wasn't aware of these options! Sorry and thank you.