OK, I was wrong. It was also configured to run filters on the IMAP account, even though I had no filters configured that would apply. However, even after disabling the option to apply filters to the IMAP account, the behavior continues.
Also, I didn't check a lot of folders, but the ones I did check did not show the same behavior. -- Connecting to IMAP server with Kmail causes mails to show up twice in web interface https://bugs.launchpad.net/bugs/63809 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs