Go to Settings > Mail, then tap Accounts.
Tap Add Account, tap Other.
Tap Add Account.
Choose Other.
Tap Add Mail Account.
Enter Name, Email, Password and Description, then tap Next.
Choose IMAP.
Use mail.ctitech.com as the host name for Incoming Mail Server and Outgoing Mail Server.
Enter the User Name, the whole email, and Password for your account in both Incoming Mail Server and Outgoing Mail Server.
Once all of the Information is entered. Tap Next.
Tap Save to complete the setup of your CTI Email on your iPhone.