ns.rcpod.siberia.net has no MX records.
Question and response
Question
dig ns.rcpod.siberia.net. MX
Answer
The response has no answer records.
Authority
rcpod.siberia.net. 86400 SOA ns.rcpod.siberia.net. root.rcpod.siberia.net. 2023011515 7200 900 86400 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0