mbox1.netikka.net has one IP number , which also has a corresponding reverse pointer. mail.xn--kassajrjestelm-bibi.fi point to the same IP. rmk.fi, wns.fi, nbf.fi, syo.fi, vlp.fi and at least 100 other hosts use this as a mailserver. netikka.net is delegated to two nameservers, however one extra nameserver is listed in the zone. All nameservers are at netikka.fi. All of them are on the same IP network. Incoming mail for netikka.net is handled by two mailservers at netikka.net themselves. They are on the same IP network. netikka.net has one IP number. mbox1.netikka.net is hosted on a server in Finland.