How to add an ITLnet email account on your iPhone, iPad, or iPod touch

Tap Settings.
Scroll down and tap Mail, Contacts, Calendars.
Tap Add Account.
Tap Other > Add Mail Account.

Provide the required information to finish adding your account:

My Email settings
Name: Your Full Name
Email: username@itlnet.net
Password: your email password
Description: itlnet

Tap Next

Account type: IMAP

Incoming Mail Server Settings
Host Name: mail.itlnet.net
User Name: your username
Password: your password

Outgoing Mail Server Settings
Host Name: mail.itlnet.net
User Name: your username
Password: your password

Tap Next

Wait for next screen to appear

Tap Save


Reference:
Apple: Add an email account on your iPhone, iPad, or iPod touch
http://support.apple.com/en-us/HT201320