ip18-p1.jotanet.pl has no MX records.
Question and response
Question
dig ip18-p1.jotanet.pl. MX
Answer
The response has no answer records.
Authority
jotanet.pl. 86400 SOA max.digi.pl. hostmaster.pirxnet.pl. 2026011601 21600 7200 1209600 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0