_spf.enet.vn.ua has no MX records.
Question and response
Question
dig _spf.enet.vn.ua. MX
Answer
The response has no answer records.
Authority
enet.vn.ua. 86400 SOA ns1.enet.vn.ua. hostmaster.everest.vn.ua. 2026022601 86400 14400 2592000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0