mail-vm.samaralan.ru has no MX records.
Question and response
Question
dig mail-vm.samaralan.ru. MX
Answer
The response has no answer records.
Authority
samaralan.ru. 86400 SOA ns1.samaralan.ru. dav.ns1.samaralan.ru. 2025111101 3600 60 200000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0