ns3.ha-vel.com has no MX records.
Question and response
Question
dig ns3.ha-vel.com. MX
Answer
The response has no answer records.
Authority
ha-vel.com. 3600 SOA ns.ha-vel.cz. hostmaster.ha-vel.cz. 2026021400 10800 3600 1814400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0