[Dovecot] NFS quota: hard or soft

Yes. I could spend more time testing this myself or examining the code. It looks to me that, with fs quota, dovecot refuses to store a mail
(e.g. when the client moves a mail from one IMAP folder to another)
if the user is beyond his soft limit. Is this correct/intended? Knowing nothing about the IMAP Quota
extension, I would have expected that being in grace was OK. At
least, this is what would happen if dovecot wasn't quota aware and
the file system would enforce the limits.