dns2.spider.pl has no MX records.
Question and response
Question
dig dns2.spider.pl. MX
Answer
The response has no answer records.
Authority
spider.pl. 3600 SOA dns1.spider.pl. admin.spider.pl. 2024020802 7200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0