Still would have done nothing in this case, as they pulled the correct email address he uses for npm from another source (public API I think?).

That's exactly why I said all the other "helpful" recommendations and warning signs people are using are never foolproof, and thus mostly useless given the scale at which phishing campaigns operate.

Great if it helps you in the general case, terrible if it lulls you into a sense of confidence when it's actually a phishing email using the right email address.