mail.irmac.ir has one IP number , which is the same as for irmac.ir, but no corresponding reverse pointer. aig.ir, asra.ir, iaio.ir, iaci.ir, iepg.ir and at least 71 other hosts point to the same IP. irmac.ir use this as a mailserver. irmac.ir is a domain controlled by two nameservers at isiran.com. They are on the same IP network. Incoming mail for irmac.ir is handled by two mailservers at irmac.ir themselves. Two mailservers have the same IP number. mail.irmac.ir is hosted on a server in Iran.