Bulk Email Portal

Build a web application to send bulk email which include To,Cc,BCc, Subject, MessageBox(HTML enabled) and file upload. Emails must use background processing to send so that user can again email to other id (program will take some time to send more email like 500+ emails so we need to process in background). keep in mind that all controls entries will be optional. You also have to code some logic for emails separation and real time verification so that wrong emails and not working emails id will excluded before sending. Note: please contact only if you have done some project of this type previously.