In the good old days of the good old kmail, when I selected an imap folder, it switched to it, showed the message list, added the new messages, and displayed the first new message, all in less than a second. Now with the new kmail each time I select an imap folder, it rebuilds the message list from scratch, reorders them, re-threads them, then waits a bit for the new messages to arrive, and each step takes several seconds. WWWHHHYYYYYYYYYYYYY?? Reproducible: Always
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.
After a week of frustration I gave up Kmail2, migrated to Thunderbird, and never looked back.
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.