relay2.ttk.ru has no MX records.
Question and response
Question
dig relay2.ttk.ru. MX
Answer
The response has no answer records.
Authority
ttk.ru. 3600 SOA dns-prim.transtk.ru. nsmaster.transtk.ru. 2026021601 10800 900 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0