staticip.ostnet.pl has no MX records.
Question and response
Question
dig staticip.ostnet.pl. MX
Answer
The response has no answer records.
Authority
staticip.ostnet.pl. 86244 SOA dnsmaster.ostnet.pl. admin.staticip.ostnet.pl. 2025110507 3600 3600 1814400 86244
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0