smtp2.dds.nl has one IP number , which also has a corresponding reverse pointer. forward1.dds.nl point to the same IP. dds.nl, mx2.dds.nl, wmn.dds.nl, jrw.dds.nl, wmo.dds.nl and at least 78 other hosts use this as a mailserver. dds.nl is a domain controlled by two nameservers at dds.nl themselves. They are on the same IP network. Incoming mail for dds.nl is handled by five mailservers also at dds.nl. All of them are on the same IP network. dds.nl has one IP number. smtp2.dds.nl is hosted on a server in Netherlands.