mrvn.spnet.net has no MX records.
Question and response
Question
dig mrvn.spnet.net. MX
Answer
The response has no answer records.
Authority
spnet.net. 600 SOA ns.spnet.net. shtinkov.spnet.net. 2024030501 28800 7200 1209600 1800
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0