From the developer: "DynDnsAgent is a client program (on the task bar) that helps users who have a dsl, cable, satellite connection to host their servers at home. the dyndnsAgent does the corresponding relation between the domain name and the machine. It allows you to define your MX email server and also your subdomains. Whith the dyndnsagent, you can host all your application servers : web, email, ftp, databases , etc."