I have a problem with a site that sends out 100+ real estate emails out of a Real Estate application. The application prompts for the following SMTP Server (to send the emails) (port) and Authentication Methods. The clients internet is unstable, as a result of this emails sent to their hosted exchange provider frequently drops connections and only sends 10 out of 100 emails at a time. The OS that the database machine runs on is Windows 7. To resolve this issue I am looking to queue the emails locally and send them in groups of 5 over a 10 minute interval to resolve the issue. However I am struggling to find an application that can provide these features. Can anyone please suggest some applications?