mail5.eon-is.com has one IP number , which also has a corresponding reverse pointer. eon.nl, bkb.de, eon.de, eon.se, eam.de and at least 100 other hosts use this as a mailserver. eon-is.com is a domain controlled by four nameservers at eondns.net. Two of them are on the same IP network. Incoming mail for eon-is.com is handled by six mailservers at eon-is.com themselves. Some of them are on the same IP network. mail5.eon-is.com is hosted on a server in Germany.