Instead of having sent mail placed in a 'sent' folder, I have it put in the inbox (this allows email threads to be shown together like Gmail; eventually I move the whole thread to an archive folder). Bug: messages listed in the inbox are labelled with subject and recipient (To field), using the "Fancy" theme. It appears this happens in any folder where sent mail is placed, which makes sense for folders only containing sent mail but not for folders which are also inboxes. What should happen: whether sender or recipient is shown should be configurable, or be the sender when in an inbox. ('Folder properties' → 'view' → 'show column' may be configuration intended for this, but doesn't work.) Or possibly the theme should show both "To" and "From" using abbreviations for common names or something. Reproducible: Always Steps to Reproduce: Edit identity, set sent mail folder to the inbox. Restart if necessary, then view mails in your inbox.
This bug has only been reported for versions before 4.14, which have been unsupported for at least two years now. Can anyone tell if this bug still present? If noone confirms this bug for a Framework-based version of kmail2 (version 5.0 or later, as part of KDE Applications 15.12 or later), it gets closed in about three months.
Just as announced in my last comment, I close this bug. If you encounter it again in a recent version (at least 5.0 aka 15.08), please open a new one unless it already exists. Thank you for all your input.