I am a real estate investor who is trying to make real estate offers on the real estate for sale section of Craiglist. I download emails from Craiglist e.g. (hous-418189765 at craiglist dot org). When I try and email (about 100 emails at a time), I get blocked by Craiglist. I get the following attached error message. How can I send the email without being blocked? Is there some type of time delay that can be used to send the emails?