10,000 opt-in business email addresses

The project is very straight forward: Our client needs 10,000 active email addresses of BUSINESSES that opted in to a mail list in order to comply with current spam regulations. There will be 2 emails sent to each email address over a period of 4 weeks. The email must be sent from our client's email address (they can set that up for you) and they will provide the text and attachment that will need to be sent to the receivers. We will be watching the results on the client's email and website and as such will be able to see if you did your job properly or not.