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.steinberger@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