Galaxy S5 - How to download full email message for reading offline in the standard email app?

[PetraTod]

Hi - I am using the built-in email app on my new Samsung Galaxy S5 for my corporate email account and would like to change the settings so that the text of my emails are automatically downloaded so I can read them without tapping "Load More", especially when I have no service on the subway. My Gmail application already does this automatically. Any tips?