What is the mail client?  I had the same problem with Thunderbird until 
I found the answer on this list a while back.  It's not a Dovecot issue; 
it's the way Thunderbird handles deletions.  mbox does not support 
folders containing messages+folders, so it was attempting to delete a 
folder by sending it to the "Trash" folder, which obviously won't
work
given the constraint above.  The solution, at least with Tbird, is a 
removing a check from the box under Tools->Account 
Settings->{accountname}-Server Settings->Advanced: "Server supports 
folders that contain subfolders ansd messages".  I don't know if other 
clients have this setting, but it fixed my problem with deleting folders.
RobertC
Matt Juszczak wrote:> Hi all,
> 
> We're using the mbox format and I tried setting up IMAP on my
boss's
> computer tonight.
> 
> He likes subfolders, and although they work, he can't seem to remove 
> subfolders once he created them, nor create new folders without using 
> something other than his mail client (like mkdir from the command line).
> 
> Any ideas on this?  Does dovecot just not officially support IMAP and 
> subfolders with the mbox format?  Or could it be a permissions issue?
> 
> -Matt