On the Home tab, in the New group, click New E-Mail.
Keyboard shortcut To create an email message, press CTRL+SHIFT+M.
In the Subject box, type the subject of the message.
Enter the recipients' email addresses or names in the To, Cc, or Bcc box. Separate multiple recipients with a semicolon.
To select recipients' names from a list in the Address Book, click To, Cc, or Bcc, and then click the names that you want.
I don't see the Bcc box. How do I turn it on?
To display the Bcc box for this and all future messages, on the Options tab, in the Show Fields group, click Bcc.
After you have composed the message, click Send.