Summary
mail.gigabox.pl has one IP number , but the reverse is
srv26.ogicom.pl.
home.gad.pl,
box3.punkt.pl,
box2.punkt.pl,
box5.punkt.pl,
smtp2.agbud.com and at least 34 other hosts point to the same IP.
jtt.pl,
elmix.pl,
toral.pl,
wipax.com,
tad.com.pl and at least 64 other hosts use this as a mailserver.
gigabox.pl is delegated to two nameservers, however both delegated nameservers are missing in the zone. All nameservers are at
gigabox.pl themselves. They are on different IP networks. Incoming mail for
gigabox.pl is handled by one mailserver also at
gigabox.pl.
gigabox.pl has one IP number.
mail.gigabox.pl is hosted on a server in Poland.