I can't remember that far back - it would have been over 40 years ago when I was an undergrad. We had an email system on the university's IBM mainframe and on t

I can't remember that far back - it would have been over 40 years ago when I was an undergrad. We had an email system on the university's IBM mainframe and on the CS department's Unix system (a PDP-11). When I got to grad school a few years later, I had access to email on Arpanet (the precursor of today's internet).