csmtp.didc.cz has no MX records.
Question and response
Question
dig csmtp.didc.cz. MX
Answer
The response has no answer records.
Authority
didc.cz. 3600 SOA ns.wedos.com. wedos.wedos.com. 2026011401 3600 1800 1814400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0