mx01.t.ht.hr has no TXT records.
Question and response
Question
dig mx01.t.ht.hr. TXT
Answer
The response has no answer records.
Authority
t.ht.hr. 3600 SOA dns1.ht.hr. dns.t.ht.hr. 2602260001 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0