dl.tntu.edu.ua has no MX records.
Question and response
Question
dig dl.tntu.edu.ua. MX
Answer
The response has no answer records.
Authority
tntu.edu.ua. 86400 SOA ns.tntu.edu.ua. admin.tu.edu.te.ua. 2026030301 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0