mail-lb02.lovit.ru has no MX records.
Question and response
Question
dig exch-lb02.tut.net. MX
Answer
The response has no answer records.
Authority
tut.net. 3600 SOA ns1.tut.net. noc.tut.net. 2026022000 3600 600 86400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0