how to enable server disk space usage alert email?
Your best bet would be using something like Zabbix or a web cloud service like Hetrix Tools (They have a free account available).
i was hoping the server would just tell me its getting full,
i had some user accounts suspended because they hit limits, and didnt even inform server admin :/
To quote Overseer, "99 bugs in the code" ;D
It would be nice, but it doesn't currently.