Microsoft Office 365, branded as "Cowboy Mail" is the email system used by OSU students, faculty, and staff. Microsoft Office 365 also includes access to other Microsoft applications and services.
OSU email addresses always end in “@okstate.edu” and are where university communications are sent. Users may also access other Microsoft® Office 365™ services like Word or PowerPoint. Students retain their “@okstate.edu” email address after graduation.
To access Cowboy Mail, visit http://cowboymail.okstate.edu/
Enter your OSU Email address.
After typing in your email address, you will be prompted for a password.
If you have multi-factor authentication enabled on your account, you may be prompted with this screen before advancing. Choose your preferred authentication method to verify your identity.
You will now be signed into your Cowboy Mail account.
External Email Warning
When receiving an email from outside of the OSU domain, you will receive the following warning message at the top of the email:
“CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.”
Older emails from before May 11th, 2020 may display this message instead:
“**External Email – Please verify sender email address before responding.**”
If you believe this message is Spam or a Phishing Attempt, please forward the email to email@example.com for further assistance.
Frequently Asked Questions (FAQ)
- How do I upgrade from Microsoft Office 2016 (or older) to Office 365?
- Does Cowboy Mail offer encryption services?
- How do I print attachments in Outlook without saving them?
- How do I Recover Deleted Items in Outlook?
- I recently reset my O-Key password, and now I can't log into my account from a web browser. How do I fix this?
- How do I stop receiving duplicate emails?
- How do I update my display name in Office 365?
You can set a ‘Preferred First Name’ in O-Key that will display in Cowboy Mail. Setting this will also hide your middle name. Instructions for setting a ‘Preferred First Name’ in O-Key can be found here.