As per my comment above (comment #179), it would be "running the filters manually (via Ctrl-J)". I haven't yet reverted to not using filters at all and dispatching several mailing lists to their respective sub folders by using the "Move to folder" functionality.
I can also confirm that automatic filtering leads to considerably more duplicate entries than manual filtering. I have set up a VM with a simple mail setup (one POP3 resource receiving messages from 3 mailing lists), and with automatic filtering, the issue was clearly visible with about 10 to 20% of mails affected. I have reset that one now, and switched to manual filtering, to see if I catch any duplicates here as well. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/883459 Title: KMail duplicates emails To manage notifications about this bug go to: https://bugs.launchpad.net/kdepim/+bug/883459/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs