Yes, rzn.host can receive emails.
No, rzn.host 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
None
MX records
in1-smtp.messagingengine.com
66.111.4.74
in2-smtp.messagingengine.com
64.147.123.52
sss.pp.ua
51.38.115.65