Have you tried to add
https://doc.dovecot.org/2.4.1/core/summaries/settings.html#imap_client_workarounds
imap_client_workarounds {
tb-extra-mailbox-sep = yes
}
to see if it helps?
> On 20/09/2025 20:06 EEST Rupert Gallagher via dovecot <dovecot@dovecot.org>
> wrote:
>
>
> When I open TB, I see folder X, then it disappears.
>
> Other users are clear. This is the only user where the problem occurs, and he
> really likes renaming folders, deleting them and moving them around a lot.
>
>
> -------- Original Message --------
> On 9/20/25 19:02, Rupert Gallagher <r...@protonmail.com> wrote:
>
> > I am still looking into it. TB is the latest version without extensions.
> > What I see in TB's registry are lines like
> >
> > - deleted the content of folder X
> >
> > followed by
> >
> > - the operation on X failed. The server responded: mailbox X does not
> > exist.
> >
> >
> >
> >
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