Kmail not syncing read/unread state with imap mailbox

[Francesco]

On giovedì 2 maggio 2019 19:08:25 CEST Francesco wrote:
> On Thursday, 2 May 2019 18:17:28 CEST Daniel Vrátil wrote:
> > On Monday, 29 April 2019 16:23:07 CEST Francesco wrote:
> > > On lunedì 29 aprile 2019 13:12:38 CEST Francesco wrote:
> > > > On lunedì 29 aprile 2019 11:50:33 CEST René J.V. Bertin wrote:
> > > > > On Monday April 29 2019 11:35:08 Francesco wrote:
> > > > > >messages still not marked as read!
> > > > > 
> > > > > Even messages that came in while kmail wasn't running?
> > > > 
> > > > I think so, but I'll do further checks.
> > > > However I don't get that point of this question.
> > > 
> > > I've done further investigations... keeping kmail closed and
> > > akonadi
> > > stopped, I retrieved new mails on Thunderbird and read those.
> > > Back to Kmail, checked new mail... they are correctly marked as
> > > read!
> > > 
> > > So the issue seems to be limited to mails that are already fetched
> > > by
> > > Kmail and later read on other clients. For those mails already
> > > marked as read, KMail seems to retrieve the correct status.
> > > 
> > > Odd...
> > 
> > Does this happen exclusively with Gmail? We do handle Gmail a little
> > bit differently from other IMAP server (because Gmail's broken).
> > Could you try and see if you can reproduce the same problem with
> > some other email provider, please?
> > 
> > - Dan
> 
> Actually, I see this happening with my yahoo mailbox accessed via
> Imap.
> 
> But yes, occurring also with Gmail.
> 
> Maybe later I'll try also with hotmail and gmx.

So, after some further testing, I can reproduce the same problem with 
Gmail, hotmail, gmx and email.it.

All of these accounts set up as imap.

Version of Kmail tested:
- 5.11.0 on Arch linux (updated)
- 5.10.3 on Kubuntu 19.04 (updated)

-- 
F