We are seeing this occurring in 2.1.17 imap
. rename "INBOX.Folder1" "INBOX.SubFolder.Folder1" . NO [CANNOT] Renaming not supported across conflicting directory permissions Permissions don't have the sticky bit like other posters drwx------ 1 mail mail 428 Oct 13 00:15 .SubFolder drwxr-x--- 1 mail mail 344 Oct 24 18:19 .Folder1 Chmod 700 .Folder1 fixes the issue and lets dovecot move it. -- View this message in context: http://dovecot.2317879.n4.nabble.com/Renaming-not-supported-across-conflicting-directory-permissions-tp40122p44969.html Sent from the Dovecot mailing list archive at Nabble.com.