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Now let's talk about the very mysterious cc, BCC and Reply All Email Features CC stands for Carbon Copy. In addition to the main recipient of your email, you have the option to copy somebody if you want them to be informed. In this case, the main recipient of your email will be able to see who you've copied. Now for bcc, BCC stands for Blind Carbon Copy. If you BCC someone, the main recipient of your email will not be able to see who you've blind carbon copied. If someone has been BCC received on an email, that is the last email they'll be able to see in that thread. My advice is to use this feature wisely and strategically. And when you receive an email, the first two things you should always do are look at who sent it and who it was to. Which brings us to Reply All. If you look and the email was sent to you and you alone, feel free to just use the Reply button. But if you look and the email was sent to you and a bunch of other people, be careful how you reply. If you want to only reply to the original sender, use the Reply button. If you want your reply to go to the original sender and all of the other recipients, that is the Reply all button. I rarely use the Reply all button. There are very few instances where it's actually appropriate. You'll get the hang of when that is.