You do not need to compromise anything, you can put any address in the "from" field. Email has no universal verification for sender address.
I would sincerely hope .gov addresses use SPF/DKIM/DMARC. That makes spoofing impossible. In Revolut's case, the sender's email system had been compromised.
I would sincerely hope .gov addresses use SPF/DKIM/DMARC. That makes spoofing impossible. In Revolut's case, the sender's email system had been compromised.