How can I permanently save an email on an IPhone 5?

How can I permanently save an email on an IPhone 5? - 1

Screen capture it.

COPY ITS CONTENT INTO NOTE BOOK AND SAVE.

Store it wherever in the Mail app or whatever app you use for email. Its a reflection of what you see on a computer, etc. Or just not delete it

Save it in a folder.

You have to hack it/jailbreak it in order to acomplish most otherwise easy functions. All thanks to DRM and apple