dns.intibs.pl has no MX records.
Question and response
Question
dig dns.intibs.pl. MX
Answer
The response has no answer records.
Authority
intibs.pl. 360 SOA dns.intibs.pl. admin.intibs.pl. 1630281372 360 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0