Yes, jvunsigned.com can receive emails.
No, jvunsigned.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
45.55.110.32
MX record
mtam6qbk.jvunsigned.com
198.199.108.126