[Dovecot] Shared Mailboxes (symlink) and kmail: known issues? [partly solved]

[Wilhelm Meier]

Am Dienstag 20 Januar 2009 schrieb Timo Sirainen:
> On Tue, 2009-01-20 at 07:21 +0100, Wilhelm Meier wrote:
> > Hi,
> >
> > Am Montag 19 Januar 2009 schrieb Timo Sirainen:
> > > On Mon, 2009-01-19 at 18:32 +0100, Wilhelm Meier wrote:
> > > > kmail instead seems to have some problems: if I save a mail
> > > > into the shared-folder, the other users are seeing this new
> > > > mail almost immediately. But if I delete(!) a mail from the
> > > > shared-folder, the list of the other kmails remains untouch.
> > > > Refreshing does nothing. I have to close kmail and restart.
> > > >
> > > > Is this related to some sort of wrong config of the shared
> > > > mailboxes or is this a (known) dovecot <-> kmail problem?
> > >
> > > My guess is that kmail assumes it's the only client accessing
> > > the mailbox and doesn't bother handling IMAP notifications
> > > about expunged messages.
> >
> > If I delete the mail via kmail, the mail gets the "T" flag, but
> > the mail-file remains there and the other kmail shows the mail
> > (strange?). If I afterwards open the mailfolder via e.g.
> > squirrelmail, the mail-file gets deleted, and it vanishes from
> > the kmail list, if I refresh the view in kmail.
>
> OK, so what you're saying is that you're only marking messages with
> \Deleted flag, you're not really expunging them from disk. And
> kmail ignores flag changes done by other clients (or does it see if
> another client changes e.g. \Seen flag?) kmail notices the EXPUNGEs
> anyway.
>
> So what the kmail users would need to do is to trigger the EXPUNGE
> using kmail somehow, there's probably a "expunge", "compact" or
> something like that somewhere.

Thanks for this hint: the problem is partly solved: kmail has a 
flag "auto-expunge". I set this to true and then kmail asynchronously 
does the expunge. It seems that selecting INBOX in kmail triggers 
this event. Refreshing the folder or retrieving new messages doesn't!

Other question: is it save with respect to dovecot to remove 
the "T"-flagged messages in the maildir, e.g. per inotify? Yes, this 
is a hack, I know.

> > The difference is, that squirrelmail does a login/logout every
> > time it looks for mails. kmail stays logged in.
>
> What squirrelmail probably does is a real EXPUNGE instead of only
> marking the messages as \Deleted.

-- 
Wilhelm