For this service, you will need Web-based e-mail enabled for your domain.
Web-based e-mail empowers you with the ability to check your e-mail wherever you are in the world, providing you have access to a computer on the internet.
To access web-based e-mail you will need to go to http://mail.your-domain.co.uk/. Depending on your setup, you may be presented with an entry screen or taken directly to your webmail. If you are presented with an entry screen, click on the 'Squirrelmail' icon to view your webmail.