centaurus.stresovice.net has no MX records.
Question and response
Question
dig centaurus.stresovice.net. MX
Answer
The response has no answer records.
Authority
stresovice.net. 3600 SOA ns.spoje.net. tech.spoje.net. 1772042417 3600 600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0