Hello Sir,
We are a team of skilled operator with lot of experience in this segment. I have gone through your project description, its really a simple task, We ll collect data in following steps: 1st we ll visit directories and collect all, then we ll filter it up and collect only the unique value, then we ll use zoom info, to search people as i believe linkdin or something can not fulfill your requirement coz they stooped providing direct email.
Sir, we are waiting for your reply for communicate also like to make a sample if you allow by a single reply.
Thanks
DG