cte.cz has no MX records.
Question and response
Question
dig cte.cz. MX
Answer
The response has no answer records.
Authority
cte.cz. 3600 SOA ns.onebit.cz. hostmaster.onebit.cz. 2026022001 43200 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0