Most instructors require that you communicate via your ONID email rather than through a non-OSU messaging system.
ONID Email Using Google Apps for OSU
Students' ONID mailboxes are hosted at Google Apps for OSU, and all email sent to your ONID email addresses (email@example.com) is delivered to Google Mail.
Use the Google Apps for OSU login portal to access your ONID email.
Using an Email Client
If you would prefer to use an email client such as Outlook, Thunderbird or Mac Mail (instead of either web-based access described above), please access the ONID email client configuration helpdoc for guidance.