mmx.cetin.rs has no MX records.
Question and response
Question
dig mmx.cetin.rs. MX
Answer
The response has no answer records.
Authority
cetin.rs. 3600 SOA ns1.regzone.cz. administrator.czechia.cz. 2026022302 10800 1800 1814400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0