[Dovecot] Can't remove folder

Hello,

Here is a 'me too' somewhat like: http://www.dovecot.org/list/dovecot/2006-January/010759.html

Example scenario: /u/username/Mail/subfolder/somebox subfolder is a directory somebox is a mbox

When I use Thunderbird's "Delete folder" function on the somebox the message appears: "Target mailbox doesn't allow inferiour mailboxes".

Thunderbird, by default, tries to move it to Trash instead of deleting it directly. When I change the preference to "Remove it immediately" it works.

Which component is at fault here:

• limitation of a mbox only setup?
• thunderbird should know
• limitation of the imap protocol to advice the client it's mbox backed
• feature of dovecot, could it be fixed or worked around somehow

-- Leroy