mail.mydom.it has two IP numbers. They are on the same IP network. mail.exx.it, mail.sii.it, mail.art1.it, mail.hgare.it, mail.aical.it and at least 55 other hosts point to the same IP. mydom.it use this as a mailserver. mydom.it is a domain controlled by two nameservers on the same IP network. Incoming mail for mydom.it is handled by one mailserver having a total of two IP numbers. They are on the same IP network. mydom.it has one IP number. mail.mydom.it is hosted on two servers in Italy.