Yes, they won't see the recipients in the Bcc field. But Outlook just used your own email address in the "To" field and didn't disclose any emails in the Bcc field.

You don't like Outlook to put your email address in the "To" field? If this is the problem you want to fix, you need to use another email client such as Outlook Express, which uses "Undisclosed-Recipient" if you leave the field "To" blank.