Vacation messages and auto-responders are managed through the webmail interface. To access webmail, go to http://www.easthawaii.net and login using your full email address and password.
The next screen will take you to your Inbox. On the left-hand side of the screen you will see a menu listing your folders.
Expand the "Mail" folder by clicking on the + sign. Click on "Filters". The screen on the right will change, click on "Vacation" in the right-hand menu.
The next screen will allow you to compose your autoresponse. Click Save when you are done writing. You will return to the Rules List where you can click on the red X to turn it to a green checkmark. Your autoresponder is now functioning.
To disable it, just click on the the green checkmark to turn it to a red X.