[oefrha]

If I run a university IT system I certainly don’t want someone who possibly attended a program thirty years ago walking around with an apparent affiliation with my institution. I find my institutions’ policies of (IIRC) one year forwarding + permanent alumni email pretty reasonable.

Additionally, making people who want to cold email work a little to acquire the current email address is actually a good thing, especially if they want to talk about something years old. I’ve generally had a lot more pleasant and engaging correspondence with people who worked out my email (say from a side project I develop pseudonymously) than ones who directly lifted my email from my professional profiles. So, expiring emails in papers generally isn’t a real problem anyway, and it’s basically never a hurdle if your target is still in academic circles. It only becomes a problem in this specific context of automated authentication (based on something not intended for that purpose).