Read-flag of mails don't update

[Marius Rasch]

Hi,

since one or two month I have a problem with Dovecot not updating the 
read-flag on mails using IMAP. I receive new mails, but when reading, 
they still unread on other devices (but shown as read on the first device).

When I remember correct, this problem doesn't come with an update of 
dovecot, but just occured at some time. But I've updated dovecot since 
then a few times.

Whenever a client connects to dovecot I get an panic in the log. I 
therefore added a log file and my dovecot configuration (is this fine or 
does it need to be in the mail body?). There are system information in 
the output of dovecot -n; the filesystem dovecot is running on is ext4.

I hope I provided all information needed and seeing forward to get a 
hint what the problem might be.

Marius
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