mx1.casablanca.cz has no MX records.
Question and response
Question
dig mx1.casablanca.cz. MX
Answer
The response has no answer records.
Authority
casablanca.cz. 86400 SOA ns1.casablanca.cz. servis.casablanca.cz. 2026030401 3600 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0