mail.kpost.com has one IP number , which also has a corresponding reverse pointer. mx.kpost.com, mail.1919.biz, mail.akban.net, mail.paxta.net, mail.topms.net and at least 100 other hosts point to the same IP. egchem.com, mailtop.net and seoilcni.com use this as a mailserver. kpost.com is delegated to two nameservers, however one delegated nameserver is missing in the zone and one other nameserver is listed instead. All nameservers are at kpost.com themselves. Two nameservers have the same IP number. Some of them are on the same IP network. Incoming mail for kpost.com is handled by one mailserver also at kpost.com. kpost.com has one IP number. mail.kpost.com is hosted on a server in Korea.