I found this-
http://getsatisfaction.com/mozillamessaging/topics/problems_setting_up_netaddressemail
It tells you the settings required for Net@address email setup but for Thunderbird.
So if you follow this guide-
http://www.gilsmethod.com/how-to-setup-email-accounts-on-the-ipad
And user account type other, then add mail account using your details it should work.
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Syncing to Net address
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