Yes, 42o.org can receive emails.
No, 42o.org 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
50.116.10.248
MX records
mailstore1.secureserver.net
68.178.213.244
smtp.secureserver.net
68.178.213.203