A contact list is a set of contacts with a single nickname that you create. When you send mail to this nickname it is actually sent to every member of the list. This differs from a "real" mailing list in that it exists only on your computer as a convenience to you, rather than as an actual email address managed by a mailing list application on a server.
For example, you could create one contact for each family member, then add those contacts to a contact list called "Family". Then, instead of entering each person's email address individually, you can send emails to "Family" and the messages would go to all of them.
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Enter a name that you prefer.
Select the address book under
Specify the list members by either entering the names or email
addresses of contacts (the text field supports autocompletion), or by
dragging contacts from the Contacts window into the list, or by using the
Choose whether you want to hide the email addresses when you send a message to the list.
Unless it is a very small list, it is recommended that you leave the addresses hidden. This is the same thing as using the “Bcc:” feature discussed in Sending a message to several recipients.
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The contact list will be added to the chosen address book in
To send a message to the contact list, enter the name that you chose for
the contact list as the recipient in the mail composer. You can also
right-click the contact list in your address book and select