ham-web.zoner.com has no MX records.
Question and response
Question
dig ham-web.zoner.com. MX
Answer
The response has no answer records.
Authority
zoner.com. 3600 SOA ns1.regzone.cz. administrator.czechia.cz. 2026022204 10800 1800 1814400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0