Set limit for sending per day

Hi Guys,
Does anyone know how to set a limit sending per day?
For example, one of my user buy 10,000 credits from us than I wanna limit them to send only 500 emails per day. If they send out 1,000 emails the campaign will be paused at 500 and then resumed on the next day.
Thanks, I've set the daily quota 2 emails per day for testing purpose. Yesterday 2 emails has been sent out of 3, but my question is that campaign will auto resume or I need to manually pause and resume?