Setup a vacation message:
If you are going to be out of the office, or would like to have an auto-reply message that is sent to anyone who emails you, you can set this up in webmail. Start by clicking on the "Options" tab and click on "Vacation Message":
Once the vacation message screen is up, you will need to enter a start and end date for your vacation notice. You will also need to enter a subject for the auto reply, and enter a number of days between the auto reply for an individual sender. You can also turn the vacation message on and off by checking the "Enable Vacation Message" checkbox:
Make sure to click the "Save" button when you are finished.