I don't know the setup at your graduating university, but I am aware of some universities who are just now starting to rethink "lifetime" alumni email. They ar

I don't know the setup at your graduating university, but I am aware of some universities who are just now starting to rethink "lifetime" alumni email. They are using email service provided by Big Tech and the reason is simple: Big Tech is starting to charge more for these email accounts and once that starts happening (which it is), the universities can't afford to offer many thousands of alumni email accounts anymore. For those universities that have gone with an authentication vendor (including two-factor providers), the costs are increasing for that too.