People did get a lot of trade magazines and other random stuff too. I didn't have work email at alll in my first job. And it was internal only at my next one until quite a few years later.

Conversely, if someone sent me physical mail at work today, I'd have to make special arrangements to even get it. If it were a package I assume/hope receiving would send me an email. Otherwise, I assume they just toss it given I haven't seen anything from them in years.