com.ninja

Can com.ninja receive emails?

Yes, com.ninja can receive emails.

Should you allow users to sign up to your website using the domain com.ninja?

No, com.ninja is a throwaway domain and should be blocked.

How to block the temporary domain com.ninja?

You can use MailCheck's free API to automatically block throwaway emails. Read our documentation to get started. No registration required.

DNS Records

Source