mail.marz.se has one IP number , but the reverse is qmail.3rex.net. mail.yws.se, mail.omc.se, mail.hem.nu, mail.ega.nu, mail.daj.nu and at least 69 other hosts point to the same IP. marz.se use this as a mailserver. marz.se is delegated to two nameservers, however one delegated nameserver is missing in the zone and one other nameserver is listed instead. Two nameservers have the same IP number. They are on the same IP network. Incoming mail for marz.se is handled by one mailserver at marz.se themselves. mail.marz.se is hosted on a server in Sweden.