Dear Confused, My pleasure. To expose the BCC field in Leopard's Mail, select View: BCC Address Field. This causes the BCC field to appear in all new messages. Alternatively, you can click on the Customize pop-up menu just to the left of a message's From area, and then choose BCC Address Field. This, too, exposes the BCC field. In Tiger's version of Mail, create a new e-mail message by choosing File: New Message, and then select View: BCC Address Field.

The versions of Mail that shipped with Jaguar and Panther let you use the BCC field, but the method for exposing the field may not be obvious. To display the field in Jaguar's Mail, open a new message and select Edit: Add BCC Header. In Panther's Mail, select View: BCC Header.

Microsoft Entourage always reveals the BCC field when you enter a new address. Just click on the To field in a new message, and a larger window that includes the option will pop up.

To expose the BCC field in MobileMe's Web-based e-mail client, locate the Composing tab in MobileMe's Preferences.

Web-based clients such as Yahoo Mail, Gmail, AOL, and MobileMe also include BCC options. When you're creating a new message in Yahoo Mail, look to the right of the To field. You'll see a Show BCC link. Click on it, and the BCC field appears. In Gmail, under the To field in a new message, you'll spy an Add BCC link. Click on it, and there's your BCC field. In AOL, click on the BCC link next to the To field in a new e-mail message. And when visiting MobileMe's mail client, choose Preferences from the Tools menu, click on the Composing tab, enable the Show BCC field option, and click on Save. All new messages you create will include a BCC field from now on.