Using mtest or pine (configured for IMAP). It would say "mailbox does not exist".
There's no such message in c-client.
If the message was "no such mailbox", that message should never occur with INBOX, even if an underlying file does not exist.
Did you modify the software, or obtain the software from a third-party that modified it? In particular, did you remove the dummy driver? [Some sorcerer's apprentices claim that the dummy driver should be removed. They are wrong.]
-- Mark --
http://staff.washington.edu/mrc Science does not emerge from voting, party politics, or public debate. Si vis pacem, para bellum.
