Any notification before the mailbox is full?

Currently SmarterMail will wait until the mailbox is full and then just start bouncing messages back to the sender. Is there some way for it to send a mail to the mailbox owner (and maybe administrator also) when the box is some percentage of full? For example, set it so at 80% full it notifies the owner. That would be much more useful than waiting until there's actually a problem, but I can't find any setting like that in the interface.

 

I did see an administrator e-mail when it hit the limit, not when it got close. Ideally, a notification would be made so some action could be taken before e-mail starts getting bounced, but if it doesn't do that, it doesn't do that.