Yes, megamail.cx can receive emails.
No, megamail.cx is a throwaway domain and should be blocked.
You can use MailCheck's free API to automatically block throwaway emails. Read our documentation to get started. No registration required.
A record
104.28.29.83
MX record
dc-6b0f0a7023b7.megamail.cx
62.77.153.150