Cowboy Mail Security enhancements
To improve account security, OSU is making some changes to how Cowboy Mail works on November 18th, 2019. This does not affect Orange Mail. Anyone using a third party email client that does not support Exchange will need to switch to one that does. You may continue using the web based version of Cowboy Mail or use Microsoft Outlook, which is available for iOS, Android, macOS, and Windows via Office 365.
Most modern laptops and PC's can install Office 365. See Microsoft for details.
Outlook for Windows and macOS