mail-mx.xnet.hr has no MX records.
Question and response
Question
dig mail-mx.xnet.hr. MX
Answer
The response has no answer records.
Authority
xnet.hr. 86400 SOA dns1.vip.hr. dnsadmin.vip.hr. 2025052101 28800 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0