Tabs

Contains all the options to work with your email - explained in more detail in Tabs section

Folder Pane

Show a list of all your current folders such as Inbox, Sent, Deleted etc as well as any folders you have created yourself

It also shows a Quick view summarizing unread emails, emails from contacts etc

Message List

Shows a list of all messages in currently selected folder

Shortcuts

Easily switch between Mail, Calendar and Contacts

Reading Pane

Provides a preview of message selected in the message list so you can see information about the sender and the message without opening it

Calendar

Shows monthly calendar and any upcoming events

File Menu

Save, print and import messages