configured a POP3 account (GMX), but whenever i delete a mail there (plus empty trash), after a while it pops up again in the Inbox as "new". in opera 12 (M2), there are two settings: "Leave Mails on Server [x]" "Until I permanently delete them [x]" While Kmail2 offers the first one, one similar to the second is absent. I am not sure what exactly goes wrong, maybe I just missed a config option in that not exactly intuitive setup? Reproducible: Always
The "Until I permanently delete them" functionality is simply not available in kmail. Though it should not redownload them after you have deleted them locally though. So i think that you should spawn a new wish report about The "Until I permanently delete them" functionality. And also please update to the new kdepim based in KDE Frameworks 5 and check if you still have this problem.
stopped using it a long time ago