Go to Settings > Mail, Contacts, Calendars. Then tap Add Account.

Tap "Add account", then insert name, email address, password and an account description.

Tap "Next". Mail will try to find out automatic settings, but we need to set it up manually.

Tap "IMAP" and insert the information for the Inocoming and the Outgoing mail server. Don't choose any type of SSL authetication

If the setting are correct, tap "Save". If not, Mail will ask you to review it. If after reading this you still can't set your account up, contact us.