On 6.10.2013, at 4.04, Noel Butler <noel.butler at ausics.net> wrote: > mail_nfs_index = yes > mail_nfs_storage = yes These are never recommended. They may be a kludgy workaround to avoid worst problems, but they will never work 100% In the recommended configurations (one Dovecot server or director cluster) you won't need them.