Can I read my email offline?

The app is built to support offline access, allowing you to compose, reply to and forward email from all your accounts even when you don't have an Internet connection.  You can also can fully manage your email (star, delete and mark email as spam) while offline, as well.

Once your Internet connectivity is restored, anything that you initiated while offline will be synced with the server, including sending composed messages and replies.   

Note:  Attachments aren’t available when offline unless you've already opened them or pre-downloaded them by enabling Auto-download attachments in Settings.