dynamic.ufanet.ru has no MX records.
Question and response
Question
dig dynamic.ufanet.ru. MX
Answer
The response has no answer records.
Authority
dynamic.ufanet.ru. 43200 SOA ns1.ufanet.ru. root.ufanet.ru. 101068 7200 1800 432000 43200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0