A free email autoresponder and mailing list management software. When your visitor fills up a subscribe form on your site, it automatically adds the visitor to a mailing list and begins the followup process. Read testimonials. Free support forum.
E-mail Follow-Up can monitor sent messages left unanswered. This add-in allows you to set the period of time that the sender should wait for the reply. If the reply isn't received within the specified time the program will notify the sender.