Read-flag of mails don't update

[@lbutlr]

On 10 Jun 2020, at 01:42, Marius Rasch <dovecot at email.marius-rasch.de> wrote:
> 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 this has happened to me its been a permission error on the server in the user’s mail folders.

> Whenever a client connects to dovecot I get an panic in the log.

Well, that is not good and knowing what the panic is might be helpful. Panic is always bad and whatever this is you need to fix it.

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

IF it’s not permissions you need to provide doveconf -n output. Bloglines for any fall, panic, or error level events at a minimum.