Bcc
Blind Carbon Copy. If you bcc someone on an email, they will receive a copy of that email, but none of the other recipients will know. For example, you want a colleague to see the email you're sending to your boss but without your boss knowing. Place your colleagues name in the bcc box and your boss will be none the wiser. Bccs are great for security and privacy, but do be warned, you never know who's bcc'd on the emails you recieve...(For brilliant tips on how to manage your email, see our 10 Steps to Success)