ip-91-187-52-18.static.hitech.cz has no MX records.
Question and response
Question
dig ip-91-187-52-18.static.hitech.cz. MX
Answer
The response has no answer records.
Authority
hitech.cz. 3600 SOA ns.nwt.cz. jv.nwt.cz. 2024020501 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0