Yes, nhn.edu.vn can receive emails.
No, nhn.edu.vn 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
nhn.edu.vn
MX records
mx.discard.email
37.120.169.172
nhn-edu-vn.mail.protection.outlook.com
104.47.26.10