This domain has no MX (Mail Exchange) records configured, which means it cannot receive emails. Any email address using this domain will not work.
mlmail.top has no MX records configured in DNS. This means the domain cannot receive emails — any message sent to an @mlmail.top address will bounce.
This could indicate a newly registered domain, a website-only domain without email, or someone attempting to use a fake email address. Do not accept signups from this domain.