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Bitcoin is the credit default swap for fiat.
https://primal.net/justin https://x.com/justingoldberg
So why leave the existing "send email as" addresses that are grandfathered in?
I have had many accounts which I don't have direct SMTP access but which I can read those emails (various aliases, forwarding accounts, Mozilla email relay, SimpleLogin aliases, Duckduckgo account).
I get that they have to protect their DKIM/SPF reputation.
Am I missing something in their UI?