If you are having trouble with email, it can often be related to your account or your device or browser. Some things to keep in mind:
If you are a new student, the issue may be related to timing. Since your account was created recently, you might be trying to use it before it is licensed and fully provisioned. Waiting an hour may help if this is the case.
If you have used email successfully and get an error on some devices and not others, this is often related to browser cache. When entering a help ticket you will be asked about attempting to log in from multiple devices.