Take a look at the Related Articles section of this article for specific instructions on connecting to e-mail with your device.
As part of the roll out of Multifactor Authentication (MFA) to protect LETU accounts, LETU accounts cannot use older client software that does not support MFA. This includes:
Upgrades to the latest Office365 installation are available for free download at http://o365.letu.edu to all LETU students, faculty and staff during their time at LETU.