ntp2.vniiftri.ru has no MX records.
Question and response
Question
dig ntp2.vniiftri.ru. MX
Answer
The response has no answer records.
Authority
vniiftri.ru. 86400 SOA ns.vniiftri.ru. noc.vniiftri.ru. 2026011505 28800 7200 604800 86400
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0