So you want to send an e-mail to a group of people without displaying the entire “To” list to everyone who is a recipient on your list.
Keep in mind that it is not necessary to have any e-mail address in the “To” field (not even your own).
In Outlook, just create a New message. In Office 2010 and 2007 you will see an “Options” tab; in Office 2003, you will see an “Options” button. Click the tab or button and an option to “Show Bcc” is available. Select “Bcc” and now you can fill in the Bcc line with all your recipients. Note that this is a “sticky” setting and will stay set in all New Messages until you go back and turn it off by clicking it again.
If you don’t send e-mail using the Bcc field very often, an alternate (and quick) way to show the BCC field in Outlook just one time is to create a New message, then click the Address Book icon. When the Select Names dialog box comes up, it shows the Bcc field at the bottom. Just select the recipients and click the Bcc button.
No matter how you reveal the Bcc field, your recipients will see only their own name when they receive the message.