In order to send SMS's or emails to one or more recipient without sending SMS's or emails to the entire guest list

Navigate to the SMS and e-mail tab on the main menu and click on New email or New SMS:

The following screen will be shown:

Click on the additional recipients text field and start typing the guest's name. Choose the guest you would like to send the SMS or email to. If the guest has not yet been added, click on the plus button and enter the guest's details:

More than one guest can be added to additional recipients:

Then enter the message and click on Send