I have deleted the e.mail app. I have reinstalled it, but none of my e.mails are there on either account

Hey, Joanfromdumfries.

I see that you deleted/reinstalled the Mail application from your iPhone 6s. The problem is, you're not receiving any emails now. I'm happy to help.

Set up an email account on your iPhone, iPad, or iPod touch -- Make sure your email accounts have been added. If they're not found under Settings > Accounts & Passwords (If you're using iOS 10.3.3 or earlier, go to Settings > Mail > Accounts), add them again and test.

If you can’t send or receive emails on your iPhone, iPad, or iPod touch -- If the email accounts were already there or you're still not receiving emails, follow the steps in this article.

Let me know how that goes.

Take care!