On Fri, 2013-08-02 at 20:21 +0800, Kavish Karkera wrote: > We have 2 pop/imap servers running with director. > > Dovecot version = 2.1.12 > Dovecot version = 2.1.13 .. > mail_nfs_index = yes > mail_nfs_storage = yes To improve performance you can remove these two since you're using director. Also you could set maildir_very_dirty_syncs=yes.