OSU provides an ONID email address for all students, faculty, staff, and others associated with the university. Additionally, most faculty and staff also have an Exchange account which may provide their primary email address (which uses the @oregonstate.edu domain).
ONID is a lot more than just email; it gives you access to Canvas, MyOregonState, and many other OSU systems. But for students in particular (as well as some faculty and staff), ONID email is their primary email address at OSU.
You may access your ONID email in one of two ways:
Support for ONID email is provided by the Service Desk.