>hello, as they are, need your help I have a client who needs to send more than 100 emails per hour because the customer is a college and should send notes to parents of students,
> but policies on the Internet when the mail server that they have contracted out realizes that more than 100 email
>hourly blocks their service and sees it as spam

If your client explains the situation to their ISP/mail provider, it might be possible to get "whitelisted" so any amount of e-mail can go through without problem. That may cost an extra monthly fee.