Incoming mail for ied.tridi.ir is handled by one mailserver at tridi.ir. ied.tridi.ir has one IP number , which is the same as for tridi.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. ied.tridi.ir use this as a mailserver. mail.ied.tridi.ir are subdomains to this hostname. tridi.ir is a domain controlled by two nameservers at isiran.com. They are on the same IP network. Incoming mail for tridi.ir is handled by four mailservers. There are two duplicated IP numbers. Some of them are on the same IP network. ied.tridi.ir is hosted on a server in Iran.