_spf.ural.rt.ru has no MX records.
Question and response
Question
dig _spf.ural.rt.ru. MX
Answer
The response has no answer records.
Authority
ural.rt.ru. 3600 SOA ns1.ural.rt.ru. dns-admin.ural.rt.ru. 2025103004 86400 86400 2419200 604800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0