rr.net.carnet.hr has no MX records.
Question and response
Question
dig rr.net.carnet.hr. MX
Answer
The response has no answer records.
Authority
net.carnet.hr. 300 SOA net.carnet.hr. ns1.net.carnet.hr. 2026021901 10800 3600 1209600 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0