_spf-h38.microhost.pl has no MX records.
Question and response
Question
dig _spf-h38.microhost.pl. MX
Answer
The response has no answer records.
Authority
microhost.pl. 1000 SOA ns1.microhost.pl. hostmaster.microhost.pl. 2026022501 1000 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0