Yes, horsefucker.org can receive emails.
No, horsefucker.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
69.89.31.102
MX records
mx1.cock.li
185.10.68.5
mx2.cock.li
198.167.223.92