The Addressing box: In this box you click next to the text "Mail to:" and then type in the e-mail addresses of the people you want this message to go to. If you want to send mail to more than one person, separate their addresses with commas. You can also send "Carbon Copies" of the message by typing in addresses next to the "Cc:"

The Attachments box: This box contains a list of any pictures or other things that you are sending with your message. We won't go into how to send attachments here but if you are fowarding a message you just received via the Forward button it will show up here.