You are referring to the Mac Mail application?
In the Mail window on the left you will see Inbox Outbox Drafts Sent and Trash.
Your Inbox will have a number indicating how many new messages you have.
The Sent box will show all Sent messages.
You can go to Mail/Preferences and set up everything just to your personal liking.
Also, with the Mac Mail application open, from the Menu Bar, click Help.
You can also get help here.
Message was edited by: Carolyn Samit