Mail forwarding after graduation
Policy Note: Yes, this is happening all the time. However, each university policy might be different on its students/staff data. Also, might be different in each case, based on the level of education. For example they might do this for their previous postgraduate students; but not their undergraduates.
You need to send an email to the system admin of the university and ask him/her very nicely to forward all the upcoming emails to your current account. Something like following:

Dear Mr/Miss X,
I was a student/staff at the university from 20?? to 20??. My university email account was me@uni.asd.edu. Could you please forward all the upcoming emails to this address to my alumni/current email address (e.g., alumni@x.edu/currentemail@site.com)?
Kind Regards,
Me