BCC, abbreviated for Blind Carbon Copy is a field in an email that allows adding message recipients but hides it from other recipients. The addresses in To: and CC: field can be added to the email, but they cannot see addresses that have been added to the BCC: field.
The BCC field for adding recipient address have some advantages over the TO: and CC: fields and some of them are shared here:
Privacy of an Individual: Although, it is important that the recipients should know to whom the message is being sent, but sometimes situation is different and so does the action! In most of the cases, we do not want the recipients to know who all are the receivers of the mail. For example:
Using the BCC field can also prove helpful when response from all the recipients is required except for a few. This is because when the "Reply to all" feature of the mail client is used, it includes the addresses in To: and CC: filed only.
Avoid Misuse of Mail Address: Most of the time when messages are forwarded, email addresses of the previous recipients are not removed. Due to this, when the message is sent to other recipients, it may contain the addresses of other recipients that might give spammers a chance to collect and use those addresses.
By default, when a new message is composed in Outlook, the BCC field is missing. Thus, to add a BCC address in the mail, it has to be manually activated. The good part is, once it is added to the mail, it will remain as it is and will be removed only when disabled.
Create a new message in Outlook 2007/2010/2013/2016 and click on "Options". Select "Show BCC" and the field will get added to the message.
For Outlook 2007:
For Outlook 2010:
For Outlook 2013:
Adding BCC field in an email is simple and if in case it has to be removed from message, the same process has to be followed. Again, click on the activated "BCC" button and it will be deactivated.