gwde1.linde.com has one IP number , which also has a corresponding reverse pointer. mail.ocap.nl point to the same IP. hci.nl, boc.com, linde.de, igsa.com, utab.com and at least 69 other hosts use this as a mailserver. linde.com is a domain controlled by four nameservers. All of them are on different IP networks. Incoming mail for linde.com is handled by four mailservers. Some of them are on the same IP network. linde.com has one IP number. gwde1.linde.com is hosted on a server in Germany.