i know the -h means "human readable" and this is no longer relevant here

, but if you run
du -k it's easier to see what's big and you can do stuff like
du -k | sort -n
in addition, you can
zmprov your accounts yourself to reactivate them from maintenance mode:
zimbra@host $ zmprov ma [username] zimbraAccountStatus active
or you can set them all at automatically (like mubley does):
zimbra@host $ for x in `zmprov gaa`; do zmprov ma $x zimbraAccountStatus active; done