ns3.bartanet.cz has no MX records.
Question and response
Question
dig ns3.bartanet.cz. MX
Answer
The response has no answer records.
Authority
bartanet.cz. 3600 SOA ns.bartanet.cz. admin.bartanet.cz. 2025060501 3600 3600 10800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0