On the menubar click on Window and choose Address Book. In the new window, click on New List. In the new dialog box that opens, choose Personal Address Book from the drop-down list. Enter a List Name, a List Nickname and a Description of the Group of contacts. In the box below, enter the e-mail addresses of the members of the group. Click on OK. Now notice the addition of the Group entry on your address book.
Open a new message composition window. Besides To type the name of the desired group. This will expand into all the e-mail addresses when you click on the send button.
