dns1.provector.pl has no MX records.
Question and response
Question
dig dns1.provector.pl. MX
Answer
The response has no answer records.
Authority
provector.pl. 3600 SOA dns1.provector.pl. hostmaster.provector.pl. 2022123010 3600 1201 2592000 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0