_spf.stisc.md has no MX records.
Question and response
Question
dig _spf.stisc.md. MX
Answer
The response has no answer records.
Authority
stisc.md. 38400 SOA ns.itsec.md. dns.itsec.md. 2025011300 10800 3600 2419200 38400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0