You can access the e-mail accounts via the Green Hosting webmail but you may also wish to use an e-mail client (such as Outlook, Apple Mail, Android Clients etc)
You can find the details you need to do this:
Configuration for each e-mail client will be different and we cannot support or set up third party software for you. However, you should be able to find instructions in the help or support sections of the e-mail client provider.
Other helps topic related to Using your e-mail account with an e-mail client