Since I updated to kde-4.14 my filter would not work anymore. I tried some stuff and found out that only the filtering by list-id is broken on ~6 mailing-lists, so I don't think it's a mailinglist specific bug. Reproducible: Always Steps to Reproduce: 1. subscribe mailinglist xy, wait for mails 2. right click on one mail. Select "Apply Filter" -> "Filter for Mailinglist xy" 3. Create filter, in my case moving to a separate folder 4. Apply filter Actual Results: Nothing happens. Expected Results: Mail(s) is (are) moved to separate folder. (The menubutton name "apply filter" etc. could differ, because I translated them back from DE to EN.) This bug appears on both of my machines (both Gentoo boxes), when I update to 4.14 (the one machine a few weeks later than the other). The version before was 4.12.5, so I think something in the code between 4.12.4 and 4.14 causes the bug.