Using the Email app

Tap the Compose icon
to compose a new message.
Tap the Email Menu icon
to switch between your email accounts and folders.
Touch and hold a message, then you can tap MARK AS READ/UNREAD, MOVE TO, or DELETE. You can also tap the Select all icon
to select all of your messages at once, then tap the action to apply to all of them.
Swipe a message off the screen to the left or right to delete the message.
Tap the Menu icon
to open the options menu to access Sort by, QSlide, and Settings.
Drag downward from the top of the Inbox list to refresh the list.