BCC Blind Copy
This is an awesome feature in Email. When you use the Blind copy others do not see you. Best way to explain this is to use an example,
John Doe wants to send and email to Mary, Lisa and Bob.
John Doe opens up a new email. He puts his email address John.Doe@email.com in the To field.
Put Mary's, Lisa's, and Bob's email in the BCC field.
When Mary gets the email, Mary will see John Doe's email but no one else's. Same thing goes with Lisa and Bob. They won't see others email as well. In fact each person will think they are the only one you emailed to.
Using BCC protects peoples email address from being shared.
For more information on To, CC and BCC field, click here.