Since there was no answer, I tried a delimiter of / but I still get the same error ... logs below:
[29-Jul-2013 12:36:26 -0500]: [8CC0] C: A0003 CREATE INBOXtest
I don't know why sshd would be listed as a folder for all users.
[29-Jul-2013 12:36:20 -0500]: [DA1C] S: * LIST (\Noselect \HasNoChildren) "/" "sshd"