ns2.CROSS-T.RU has no MX records.
Question and response
Question
dig ns2.CROSS-T.RU. MX
Answer
The response has no answer records.
Authority
cross-t.ru. 3600 SOA ns1.cross-t.ru. admin.cross-t.ru. 2025101001 3600 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0