The Accounts list displays all of your email accounts.
Open the Email app. Tap the Accounts list icon (at the top of the screen) to display a drop-down list of all of your email accounts.
Each account in the Accounts list displays the number of unread mail.
Tap an account to view its Inbox.
While viewing the combined list of your email messages, each account is indicated by the vertical lines of each color along the left side of the list.