Yes, 14n.co.uk can receive emails.
No, 14n.co.uk 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
86.143.150.53
MX record
14n-co-uk.mail.protection.outlook.com
104.47.4.36