I discovered this myself because I tried to email George myself, and the email bounced. Jeff and I are sort of on the same ISP, in the sense that we were on different ISPs, and then the company which owns Jeff's ISP bought mine too.
I have emailed the Paradise postmaster to see what they can do.
This anti-spamming technique appears to be roughly analogous to cluster-bombing a city block just to get one criminal hiding in it.