email restriction


Sorry if this is not the main place for this topic bur I have a hug problem. So far is already fix but i could happen again. 

I sen around 11k invitations to my elgg site. The email invite plugin works wonders but my hosting site got a little mad at me and trun down my site for a couple of hours, saying that I violated son rules and all. I do understand what happen and I won`t (roll eyes) do it again.

Problem: My elgg site will have a pretty good bang once is out and rolling. But i don`t want members inviting more than a few emails at a time.

Question: How can i restric my member to a certain amount of emails?

Please advise. I really need some help. 

Best Regards