Incoming mail for mx3.xs4all.nl is handled by one mailserver at xs4all.nl. mx3.xs4all.nl has one IP number , which also has a corresponding reverse pointer. mx.xs4all.nl and mx.cistron.nl point to the same IP. uni.nl, bpv.nl, lst.nl, hcm.nl, vdt.eu and at least 100 other hosts use this as a mailserver. uni.nl, bpv.nl, lst.nl, hcm.nl, vdt.eu and at least 100 other hosts share mailservers with this domain. xs4all.nl is a domain controlled by two nameservers also at xs4all.nl. They are on the same IP network. Incoming mail for xs4all.nl is handled by four mailservers also at xs4all.nl. All of them are on the same IP network. xs4all.nl has two IP numbers. They are on the same IP network. mx3.xs4all.nl is hosted on a server in Netherlands.