If you are sending an email out to a few people or a mailing list, you probably are wanting to hide the list of addresses from each recipient. You do this by using the blind carbon copy field in the message you are creating. Windows Mail has this field hidden by default, to unhide the field, follow these steps:
1. From Windows Mail, click Create Mail from the toolbar.
2. The New Message window will appear.
3. Click View and select All Headers.
4. The Bcc field will appear. Place the address(es) you wish to send a blind carbon copy.