[TUHS] The oldest user at host email on Unix

[ron minnich via TUHS]

Around 50 years ago my Unix username was minnich. Once email became
internet aware, I was minnich at udel.

At some point, Mike Minnich appeared at Udel (my "pseudo brother" as he and
I put it), I left udel, and mminnich at udel and minnich at udel emails got
crossed, frequently. So about 42 years ago, I became rminnich.

Remembering this got me to wondering: what was that first email address, in
user at host form, on Unix?