Incoming mail for mail.sisna.com is handled by four mailservers. All of them are on the same IP network. mail.sisna.com has one IP number , but the reverse is mailx.sisna.com. mailx.sisna.com point to the same IP. sisna.com share mailservers with this domain. sisna.com is a domain controlled by two nameservers at sisna.com themselves. They are on the same IP network. Incoming mail for sisna.com is handled by four mailservers. All of them are on the same IP network. sisna.com has one IP number. mail.sisna.com is hosted on a server in United States.