Firstly, don't panic! All of your University emails and documents are not going to disappear the day after you graduate.
The University gives you 90 days to move your @cam emails to either an alumni or personal email account. Well in advance of your leaving date, the UIS will send you an email letting you know when your accounts will expire.
Your Raven account doesn't expire completely, but it does change to a 'Raven for Life' account which gives you access to just the things you need after you've left the University.
You can find more detail on the whole process here.
If you have any further questions, you can contact the Computer Office.
