Confirmed. Just signed up on Amazon student last week, and I haven't been a student for over a decade. Just used a friend's address that was still active following their graduate school term. Your Amazon login email doesn't even have to be the same as the school email address ... You just enter a .edu address in during the Amazon Student signup, they send you a link to the .edu address you register to confirm your student account, and then you click that link once it arrives in your .edu mail's inbox.
Like the the deals here? Then Rep unto others as they Rep unto you - everybody appreciates it!