[Dovecot] creating subfolders without preceding inbox wanted?

Hello,

today I accidentally created a subfolder "Trash" instead of INBOX.Trash. No error was given, the creation lead to the folder ".Trash". If I know this folder, I can also select it. But a "list * * " doesn't show the Trash folder. How could I ever find this folder by the imap-procotol if I don't know it's name? Is this the correct behaviour? Or shouldn't imap simply disallow the creation of such folders, but only with preceding "INBOX."?

Regards Marten