Prevent CC'd email addresses from being created as contacts

It was just shown to me that for each email I send, in the upper right corner there are ck boxes. I have the sales connector for Outlook desktop. Whenever I open a new email to someone or to no one yet, I have a box on the toolbar that has a host of choices. Track the email, create a contact and then when I click on the bottom right corner it opens up to even more choices. Is this what you mean? Today is my first day using it and I sent an email without realzing that perhaps a contact was created but when I looked in my CRM there wasn’t one created altho it had the HS email in the bcc line.