Email Marketing

I am looking for someone to manage a mass mailing activity for me that will be ongoing. I currently have databases of approximately 3 million contacts. Those contacts need to be loaded into an emarketing tool and promotions sent daily (approximately 50,000 per day is desired capacity). Once the existing databases are exhausted, will want to research, locate and purchase more databases (US and international) to run through the system. I need an expert who can organize mass emailing with his server on an ongoing basis. Would want assistance with creation of HTML messages to be sent as well. System used must automatically handle unsubscribe requests and bounces so that database integrity is maintained. System must also deliver reports daily regarding number sent, number opened, clicked, bounced, etc. We are a fully legitimate business (real estate marketing) and content is absolutely clean. Please provide references and proof of experience/expertise in this kind of activity.