The source code for a custom Windows Service has been written using the C# programming language. The service is designed for automated and scheduled delivery of bulk email messages. It uses the MailBee.NET Objects library developed by AfterLogic. See http://www.afterlogic.com/mailbee-net/email-components Source code files are hosted in a GitHub repository. Tasks are as follows: 1. Review and understand existing code, then read and understand existing unit tests. 2. Design and program new unit tests to achieve 80% code coverage on the entity domain namespace.