Setting up email on an iPhone

Go to Settings > Apps > Mail, then tap Mail Accounts.

 Tap Add Account,  select Exchange for the email type.

 Enter your email address and a description, tap Next

 Enter your password, tap Next.

 Select Configure manually.

 The server is exchange.postoffice.net

The domain is exchprod

The username is your full email address.

 Tap Next, you should have all green checks if your password is entered correctly.

 Tap Save.