[Dovecot] Thunderbird 3.1 unable to delete subfolder of Trash under mdbox

[Timo Sirainen]

On Fri, 2011-04-08 at 16:03 +0100, William Blunn wrote:

> But with the mdbox user, Thunderbird pops up an error:
> 
> The current command did not succeed. The mail server for account 
> <accountname> responded: Invalid mailbox name: Trash/foo/.

See if imap_client_workarounds=tb-extra-mailbox-sep solves this.