When adding domainname IDN like: xn--asdfasf.test the files on disk was like the IDN domainname. Now since some recent version (this spring ?) i get the Swedish name on disk and for instance deleting that domain gives this warning and is not deleted from disk: 02.02.2018-13:36 - WARNING - Action aborted, file is a symlink: /var/vmail/åsdfösf.test/info/Maildir/.Sent So need to manually delete the files. Might be other related problems also with spamfilters that i didnt test yet (no custumer complain yet but they did resign account). PS domainname is faked in this log.