Ready-to-integrate e-mailing solution

Objective The objective is finding a developer who has a ready-to-integrate e-mailing module for Online mailing campaigns. Back ground info We have installed windows server 2003 and Exchange Server 2003 on our server. We have already developed a web service to check every minute if a mailing need to be send. We have also developed a simple structure to select a mail template and combining the template with text edited with an online editor. We have also already a structure to group contacts and to send a mailing. What we need now is a more sophisticated solution. We want to be able to track and monitor more the results of a mailing campaign. We want to see statistics about who has opened the mail, who replayed on the mail, how many receipt ions there are, etc. We want to have an easy way to connect it to Exchange 2007. We want to have an easy way to add data grids in templates, etc. Time A mailing program can be found easily online. Therefore, I am NOT looking for a developer who is going to develop it from scratch. I am looking for someone who can give me a ready-to-integrate solution. The first one who reacts with a very good offer will get the project. I need to have it working within 1 week!