mail.lealta.ru has no MX records.
Question and response
Question
dig mail.lealta.ru. MX
Answer
The response has no answer records.
Authority
lealta.ru. 3600 SOA ns1.tut.net. hostmaster.tut.net. 2025071600 3600 600 86400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0