Short description of Response Mailer - Email Auto Responder 3.6.3: Response Mailer is an automated system that instantly emails information to your customers and prospects. It can automatically reply to your e-mail messages with a prewritten response and add information to a prospect database for use in your subscription email marketing campaign. It can extract email data for use in your outgoing messages. Use it as an auto responder for customer service, purchase order processing, or newsletters.