Olivier Nicole wrote: >> meant there >> is no dns list for organizations. something like >> # lookup_company_by_ip 192.0.2.1 >> > > Reverse DNS on the contacting mail gateway? >
that only gives the domain name. but a single organization may have multiple domains, and in many cases it is hard to tell the organisation from the domain. whois will generlly help, but is is not adequate for automatic queries for every mail you receive.
