Hi Steffen Thanks for the reply!
- Users are accessing from multiple devices simultaneously - Each user has his own mailbox, we do not use shared mailboxes regards On 12/06/2016 10:14 AM, Steffen Kaiser wrote: > On Tue, 6 Dec 2016, plataleas wrote: > > > We experience some unexpected behavior with dovecot. It happens that > > emails marked as read get marked as unread (MUA is Thunderbird on port > > 143). Unfortunately this happens randomly, reproducing this issue is > > difficult. We could not find any pattern, it happens rarely. > > does your user(s) access these mailboxes from two or more clients > simultaneously - either from the same account or as shared mailboxes? > > -- Steffen Kaiser