Follow the steps below to set up your email on iPhone 4, 4S, 5. If you have higher version of iOS on your iPhone, check the following article: Email Account Setup on iPhone (iOS 7+).
Open the email client by tapping on the Mail icon. Select Add Account…

The following window will appear. Tap Other.

Tap Add Mail Account.

First you need to choose between the IMAP or POP3 protocol.

You need to fill in a name, email address and the password for this email account.
In the next section you need to fill in the incoming mail server. Here you should enter the hosting server name.

Below you should enter the server information:

After you finish entering the data, tap Next. The following window will appear

Tap the Save button.
Your mailbox has been now successfully configured.