Answer:
BCC is Blind Carbon Copy and is a way for you to hide the e-mail addresses of all the people you are sending the message to from everyone who receives it. This means your recipients do not have to dig thru a list of recipients before see the message and also that spammers that see the message cannot harvest al their addresses.

In Outlook Express and Windows Mail the default is for only the TO and CC boxes to appear. To just change on one message just click TO or CC and you will see the option for BCC also.

Windows XP had Outlook Express. Vista changed it to Windows Mail. In Windows 7 it Windows Live Mail and is not included with 7 but must be downloaded from Microsoft.

To change your settings so BCC appears on all messages you are creating you will go in Outlook Express or Windows Mail:
Click to create mail (or message)
Click the View menu
Click the All Headers option which will put a check beside All Headers
Now you will have the BCC  box showing along with TO and CC

In Windows Live Mail create a new message and click on View menu and click CC and BCC so a check mark appears.

Thanks to Mary for the question.

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