Deleted Mail Icon on my iPhone, how to get it back!

You can retrieve it either by re-downloading it from the App Store or going to Settings-General-Reset-Reset Home Screen, which will reset app layout to how it was originally. Either way, you will then need to log in again to your email, so I would go with the first option.

"here’s what I did,

I went into settings

passwords and accounts

(under accounts) and for my email, I have an iCloud account so I pressed, Icloud

I scrolled down to Mail, and I swiped it on (made sure the icon thingy was green) and then it worked!

THAT’S HOW I LOGGED INTO MY MAIL AFTER I DELETE AND REINSTALLED THE APP!"

once i had an email on my iphone but later i removed it from my device but later when I signed in all the mails were gone.How do i get those back?