pmg1.tarman.pl has no MX records.
Question and response
Question
dig pmg1.tarman.pl. MX
Answer
The response has no answer records.
Authority
tarman.pl. 86400 SOA info.tarman.pl. admin.tarman.pl. 2009042045 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 2048, xrcode 0, version 0, flags 0