https://bugs.kde.org/show_bug.cgi?id=377344
--- Comment #5 from ianse...@btinternet.com --- I've just done a few hours of testing using no filters on incoming emails. (i uncheck the "Apply filter to incoming messages" on each filter.) i now just click on the inbox and click 'Folders/Apply all filters on Folder'. I has so far not produced a duplicate email so its looking like filters on incoming is the culprit. I'll keep testing and try and find a related bug report on filters to update. opensuse:tumbleweed:20170317 Qt: 5.7.1 KDE Frameworks: 5.31.0 KDE Plasma: 5.9.2 kwin 5.9.3 kmail2 5.4.3 akonadiserver 5.4.3 Kernel: 4.10.3-1-default Nouveau: 1.0.13_2.2 -- You are receiving this mail because: You are watching all bug changes.