mail2.intility.com has one IP number , which also has a corresponding reverse pointer. fn.no, tf.no, nsf.no, clp.no, cip.no and at least 100 other hosts use this as a mailserver. intility.com is a domain controlled by two nameservers at eunet.no. They are on different IP networks. Incoming mail for intility.com is handled by two mailservers having a total of three IP numbers. All of them are on the same IP network. intility.com has one IP number. mail2.intility.com is hosted on a server in Norway.