Enter the correct email address for the carbon copy recipient of your message. To enter multiple recipients, separate the email addresses with commas. Use of any other punctuation to separate multiple email addresses will result in an error.
Carbon copies are usually sent to recipients who need not be the direct recipients of the message, but may need to receive the message for their information, usually indirectly concerned about the subject of the email. All "To:" recipients and "Cc:" recipients can see the entire list of both kinds of recipients.