[Dovecot] kmail-error: can't upload folder (imap-account on dovecot-server)

[William Blunn]

On 20/09/2010 12:26, cool.chris65 at web.de wrote:
> Everytime I try to create a folder under my imap-inbox, I get an error like
> "can't upload folder...", but after this message I can see a new folder under
> my inbox-folder, but I can't use it ...
>
> With a thundermail-client I can create a subfolder without any erro and I can
> use it r (but only first level).
>
> My conf:
> # /etc/dovecot/dovecot.conf
> ...
> mail_location: mbox:~/mail

Under the normal mbox storage layout, you cannot have mailboxes 
(folders) which contain both messages and child mailboxes (subfolders). 
The reason is explained in detail at the beginning of 
http://wiki2.dovecot.org/MboxChildFolders .

So with your present set-up you won't be able to create a folder under 
INBOX.

You can create folders at the top level, but you won't then be able to 
make subfolders in those.

To be able to nest folders freely, you could:

1. Switch your mail storage to one of the other formats: Maildir 
(Dovecot 1.0 onwards), single-dbox (Dovecot 1.2 onwards), multi-dbox 
(Dovecot 2.0 onwards).

2. Use a specialist scheme (Dovecot 2.0 onwards) to allow free nesting 
under mbox - see http://wiki2.dovecot.org/MboxChildFolders

Also worth noting that the current stable version of Dovecot is 2.0.x.

To be able to get best help on the mailing list, I would say try to use 
at least version 1.2.x of Dovecot.

Bill