_spf.mujha-vel.cz has no MX records.
Question and response
Question
dig _spf.mujha-vel.cz. MX
Answer
The response has no answer records.
Authority
mujha-vel.cz. 3600 SOA ns.ha-vel.cz. hostmaster.ha-vel.cz. 2022042704 10800 3600 1814400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0