ns2.den.ru has no MX records.
Question and response
Question
dig ns2.den.ru. MX
Answer
The response has no answer records.
Authority
den.ru. 86400 SOA ve.nu. hostmaster.den.ru. 2025080201 10800 3600 3600000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0