The terms Web-based email (or Web-based e-mail) and Webmail refer to the implementation of an e-mail client as a Web application that allows users to access their e-mail through a Web browser, as an alternative to using a desktop-based client such as Microsoft Outlook, Mozilla Thunderbird or Eudora. A webmail client is usually offered by an email service to allow its users to access their mail stored on the service's server, but there are exceptions, if this is something your business needs it is available.