A further question: if the INBOX is in the home directory, and an incoming message would take it over quota, what is _supposed_ to happen?
If delivery fails due to over quota, it is supposed to revert the file to its previous state by truncating the file to the pre-delivery size.
(imap-2002e, by the way. And the home directories are on a NFS server, so have to be NFS mounted onto the c-client email machines.)
Are you saying that the mailbox file is accessed via NFS? mbx format is not guaranteed to work via NFS.
-- Mark --
http://staff.washington.edu/mrc Science does not emerge from voting, party politics, or public debate. Si vis pacem, para bellum.