id integrate a local jev like model and for unknown emails after domain lock, include a valid email and the new email and ask the jev model to rate the likely hood its from the same sender
Interesting. Thanks for the suggestion. I was thinking some whois heuristics could do too, but there are so many corner cases.
Interesting. Thanks for the suggestion. I was thinking some whois heuristics could do too, but there are so many corner cases.