Yes, lr78.com can receive emails.
No, lr78.com 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
74.208.236.214
MX records
mx00.1and1.com
74.208.5.3
mx01.1and1.com
74.208.5.21