dovecot - Dec 2016 - Dovecot: Mails flagged as read get flagged as unread

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

Hi, There is a plugin "mail_log" that you can use to audit what 
users/user agents are doing, probably mail_log_events flag_change is 
helpful?

-- 
peter

Am 2016-12-06 um 10:24 schrieb plataleas:
> 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

Does this correspond with some index damage in logs? We did have some of 
these in 2.2.6.0 ("Missing middle file seq=.." followed by reindexing 
and "lost Recent state" message), with 2.2.7 these seem to have
stopped
appearing.


On 06.12.2016 13:34, Peter Chiochetti wrote:
> Hi, There is a plugin "mail_log" that you can use to audit what 
> users/user agents are doing, probably mail_log_events flag_change is 
> helpful?
>

Hi all

Thanks for your valuable Inputs!

@Peter: we did enable the logs with flag_change. We will try to catch
the logs when the issue appears. We try hard to reproduce, but it
happens rarely.

@Alex: in the logs we do not see any message "Missing middle file
seq=..". But we will check this more in detail.

Does the "mbox_lazy_writes" settings only affects the mbox backed? In
our case we use mdbox, thus disabling this setting would not have any
effect, right?

regards
plataleas


On 12/06/2016 11:34 AM, Peter Chiochetti wrote:
> Hi, There is a plugin "mail_log" that you can use to audit what
> users/user agents are doing, probably mail_log_events flag_change is
> helpful?
>