Click on the far right-hand drop-down menu under your name and click on 'Administration'.
Within the administration section click 'Rooms'.
Click the 'Manage' button on the right-hand side for the room you wish to configure.
Click on the 'Settings' option.
To the right-hand side, you will see the default email notification settings. Here you can turn on/off notifications for meetings (creating or updates) and publishing packs.
Please note: If required, Meeting Managers can manually turn off/on the function at the final stages when publishing.