To create new email addresses, or remove old ones simply log-in to your hosting control panel and click on the Mail icon.
To access your control panel, add /cpanel to the end of your domain name (for example, www.spacountryvillas.com.au/cpanel and insert the username and password supplied by Butterfly Internet. The interface that you see is the control panel for your web server.
You can also set-up autoresponders through this access.