Can I access an e-mail's BCC list?
No, generally there is not. After all, blind carbon copy would not be much use if it were not truly blind. If the e-mail comes from within your own organization, and you're an administrator, you could open the sender's mailbox and open the message from his or her "Sent Items" folder. This will show you who was BCC'd. But if you don't have access to the sender's mailbox, then you won't be able to see BCC information.