mail1.local

Can mail1.local receive emails?

No, mail1.local 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 mail1.local?

No, mail1.local is a throwaway domain and should be blocked.

How to block the temporary domain mail1.local?

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

DNS Records

Source