relay03.kiev.sovam.com has no MX records.
Question and response
Question
dig relay03.kiev.sovam.com. MX
Answer
The response has no answer records.
Authority
kiev.sovam.com. 3600 SOA ns.sovamua.com. domaintech.kiev.sovam.com. 2020010600 14400 3600 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0