Autor: Suresh Ramasubramanian Data: A: Exim Users Mailing List Assumpte: Re: Now well off-topic - was Re: [Exim] how to configure HELO/EHLO
and DNS for multi-homed hosts
Greg A. Woods wrote:
> rDNS does not, and cannot, point to IP addresses (PTRs can point to
> anything, but the Reverse DNS involves PTRs in the IN-ADDR.ARPA zone,
> and those PTRs in the IN-ADDR zones normally only point to canonical
> host domain names, and presumably they "MUST" point to a hostname that
> resolves to the same address the PTR was derived from -- the DNS is a
> directed graph data structure after all).
thanks for the oh so detailed explanation - and
48.223.77.202.in-addr.arpa. 57m46s IN PTR 202-77-223-48.outblaze.com.
doesn't point to a hostname which then maps back to the same IP as that
of frodo.hserus.net, then?
