Can b9adiv5a1ecqabrpg.tk receive emails?
No, b9adiv5a1ecqabrpg.tk cannot receive emails because
it has neither an A record nor MX records.
Should you allow users to sign up to your website using the domain b9adiv5a1ecqabrpg.tk?
No, b9adiv5a1ecqabrpg.tk is a throwaway domain and
should be blocked.
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