mx1.terrakultur.ru has no MX records.
Question and response
Question
dig mx1.terrakultur.ru. MX
Answer
The response has no answer records.
Authority
terrakultur.ru. 300 SOA ns1.beget.com. hostmaster.beget.com. 1757967045 300 600 86400 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0