I haven't seen the problem for a while, maybe two years. I use POP3 only, not IMAP. I run Kubuntu; currently I'm on 19.04.
Sometimes kmail crashes, and I wonder if the way I clean up is related to my not seeing duplicate filtered messages. When kmail crashes, I stop akonadi ("akonadictl stop") and look in the maildir structure like this: cd .local/share/.local-mail.directory ls */new/*S The S indicates messages which have been Seen, and according to the Maildir specification the files should not be in a"new" subdirectory; they should have been moved to a "cur" subdirectory. I therefore move them while akonadi is stopped. E.g., mv -i wastebin/new/*S wastebin/cur I then run "akonadictl fsck" and restart akonadi ("akonadictl start"). As I say, it's pure speculation that this is why I don't see duplicate messages now. -- 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