cgp.agava.net has one IP number , which also has a corresponding reverse pointer. mne.ru, x55.ru, bib.ru, lxn.ru, adbn.ru and at least 100 other hosts use this as a mailserver. agava.net is a domain controlled by two nameservers at agava.net.ru. They are on different IP networks. Incoming mail for agava.net is handled by two mailservers on different IP networks. agava.net has one IP number. cgp.agava.net is hosted on a server in Russian Federation.