Hi, this might be caused by FULLDIRNAME=DbOx-mAiLs (as far fetched as it sounds). Would it be possible for you to try it out if it happens if you remove this setting?
Aki > On 02/03/2021 21:35 Klaus Steinberger > <klaus.steinber...@physik.uni-muenchen.de> wrote: > > > Hi, > > no comments on this? This is definitly with two different IMAP Clients > reproducible. > > This led already to some message loss in user Mailboxes. > > > > we discovered a major problem with renaming folders with subfolders > > > > testszenario: > > > > folders: > > > > test1 > > test1/test1-1 > > test1/test1-2 > > > > all 3 folders contain a test message > > > > after renaming the top level folder test1 to test2 following folders exist: > > > > test2 > > test2/test1-1 > > test2/test1-2 > > > > the subfolders test1-1 and test1-2 are empty, the top level folder contains > > the > > correct message. > > > > > > Now renmaing test2 back to test1: > > > > Alle folders again contain their messages. > > > > So this looks like during renaming the top level folder just the message > > references for the subfolders got lost, and with renaming back they are > > there again. > > > > I can reproduce this behavior both with thunderbird and Horde Webmail as a > > client, also it happens with a second different dovecot setup > > > > > Sincerly, > Klaus Steinberger
