Shouldn't a DNS and ReDNS lookup match?

Dagwood Bumstead dagwood at jcdithers.com
Thu Feb 26 19:24:03 UTC 2004


Thanks to everyone for your helpful answers.


On Sun, 22 Feb 2004 22:58:50 GMT, Dagwood Bumstead
<dagwood at jcdithers.com> wrote:

>I have a situation where a mail from our host is being refused by
>another mail host.
>
>When running a DNS against our host name, the IP is returned
>correctly. But when running a reverse DNS for the IP address, our
>uplink provider is returning a completely different host name ending
>with their domain name instead of ours. 
>
>They have said they can't change it.
>
>Isn't this an error in their system that they have to change?
>
>===================
>
>In a different, but related situation, to help me understand, I have a
>different mail server that is hosted remotely. Pinging the host name
>returns the correct IP address, but the ReDNS on the IP returns the
>provider's host name (they are both the same machine; same IP
>address). How does this affect when some other mailserver does a ReDNS
>check to accept mail?
>
>Thanks for any help.


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