BCC (Blind Carbon Copy) is an email feature that people use to add a little bit of privacy to their group messages. Everyone can see the email, but the recipient list is kept secret.
Senders use the BCC field (which stands for Blind Carbon Copy) to keep their recipient list private. Unlike the regular CC field which shows you everyone on the email, BCC delivers the group message to everyone without revealing who’s on the list. When you receive one of these messages the only addresses you can see are your own, and that of the original sender.
We’ve all gotten stuck in a huge “reply-all loop” at one time. Someone CC’s a group of people, one person hits the reply-all button, and suddenly everyone’s inboxes are flooded with messages. BCC is a great way of preventing this ’ since the list of recipients is known only to the sender, only they can receive replies.
The Bcc option is a bit hidden in the latest version of Yahoo! mail. To get to it, you have to first use Cc.
Now when fire off your email from one of these programs, the people who get the messages won’t be able to see anyone else on the list and you don’t have to worry about huge group messages being generated from reply-alls.