To configure a vacation message for a mailbox in the admin panel:
- In the list of mail accounts, click Modify for the account you want to configure.
- In the Forwards/Vacation section, check the box next to Enable Vacation Message.
- Create or edit a vacation message.
- Click the Modify Email Account button.
Please note that if the box next to “Deliver to” is not checked, mail will not be delivered to the mailbox itself.