March 27 2006 06:00:00 AM Add/Read Comments 
This tip shows you how to send email messages to groups contained in your Personal Address Book, and prevent each recipient from seeing the list of other recipients' names.
Compose a new email message and click on "Delivery Options..."
On the Basic tab, click on "Do not expand personal groups"
Now when you send the email, the recipients will only see the name of the group, not all the members.
Combine this tip, with the one where I showed you how to Add Recipients to Group in Address Book, and you should be all set, and ready to email.