Incoming mail for relay.jay.net is handled by one mailserver at jay.net. relay.jay.net has one IP number , which also has a corresponding reverse pointer. smtp.jay.net point to the same IP. ping.dk, ebst.dk, hapz.dk, aafod.dk, cat-a.dk and at least 31 other hosts use this as a mailserver. ping.dk, ebst.dk, hapz.dk, aafod.dk, cat-a.dk and at least 30 other hosts share mailservers with this domain. jay.net is a domain controlled by two nameservers also at jay.net. They are on different IP networks. Incoming mail for jay.net is handled by two mailservers also at jay.net. They are on different IP networks. jay.net has one IP number. relay.jay.net is hosted on a server in Denmark.