Summary
mail1.cleanport.nl has one IP number , but the reverse is
mail1.cleanport.com.
mail.topcats.nl,
mail.blikgroep.nl,
mail1.h4hosting.eu,
mail.fokkedeboer.nl and
mailgate1.eniwetok.net cnames to this hostname.
mail.bro.nl,
mail.crf.com,
mail.benier.nl,
mail.nsecure.nl,
mx1.zendith.net and at least 16 other hosts point to the same IP.
ky.nl,
xb.nl,
jwc.nl,
dla.nl,
hpu.nl and at least 100 other hosts use this as a mailserver.
cleanport.nl is a domain controlled by three nameservers at
cleanport.com. Two of them are on the same IP network. Incoming mail for
cleanport.nl is handled by two mailservers at
cleanport.nl themselves. They are on different IP networks.
cleanport.nl has one IP number.
mail1.cleanport.nl is hosted on a server in Netherlands.