mailrelay.GAZPROM.RU has no MX records.
Question and response
Question
dig mailrelay.GAZPROM.RU. MX
Answer
The response has no answer records.
Authority
GAZPROM.RU. 3600 SOA ns.GAZPROM.RU. sysadm.GAZPROM.RU. 2026021804 900 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0