mx1.jitm.be has two IP numbers. They are on the same IP network. This hostname cnames to spam3.ihostexchange.net. mx1.jitm.eu, mx2.jitm.be, fametal.com, mx2.jitm.eu, spam4.alior.fr and at least 22 other hosts point to the same IP. jitm.be use this as a mailserver. jitm.be is a domain controlled by two nameservers at amen.fr. They are on different IP networks. Incoming mail for jitm.be is handled by two mailservers having a total of two IP numbers. There are two duplicated IP numbers. Some of them are on the same IP network. jitm.be has one IP number. mx1.jitm.be is hosted on two servers in Canada even though the hostname implies Belgium.