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Oklahoma State University

Student Email


Students have a choice in their email delivery preference. They can choose to use either Orange Mail (G Suite by Google Cloud) or Cowboy Mail (Microsoft® Office 365™).


While having access to the tools of both the Microsoft® Office 365™ and G Suite by Google Cloud, the delivery of email will come through the carrier chosen by the student. 

The official OSU email address will end in “” no matter which delivery service the student chooses. All official university communications are sent to the email address.

Students retain their “” email address and account after they graduate.



Getting Started

Use your O-Key credentials to sign in to either Orange Mail or Cowboy Mail.

For Orange Mail, go to

For Cowboy Mail, go to

You can also set up your email on your phone and install a client on your computer for easier access.