Re: DNS + Mail + internal network

Sorry to keep dragging this out but might almost be there...

It is on my internal dns because it is a secondary zone whereby it is
populated byt the transfer. I dont have any way to modify add to it because
they are grayed out.

MyDNSserver
-Forward Lookup Zones
+mydomain.mo.us
+theirdomain.org
+anothersimilardomain.county.net

So I created a new Primary ZONE called newzone.theirdomain.org. I then
created and MX record fut the FQDN then becomes this:
newzone.theirdomain.org. And then the mail server i put the legitimate
mail.theirdomain.org.

I then created an A record to point to the external IP Address. Doesnt look
right. Jsut reaching here.

Why would a company have the same dns name of a mail server and it has an
internal ip address as well as an external address?

Am I on the right track? I am at the mercy of this other agency that the PD
uses!




"Kevin D. Goodknecht Sr. [MVP]" wrote:

Read inline please.

In news:51C29217-9C7F-4E53-A81C-90E785F7B2A5@xxxxxxxxxxxxx,
COB <COB@xxxxxxxxxxxxxxxxxxxxxxxxx> typed:
I did the EDNS-) on both dns servers. Nothing changed. Do I have to
reboot after that? The command said it did it successfully so I
assumed it was done. I also tried to add teh exteranl dns server to
the virtual smtp server and coincidence or not the next few mail that
hit the queue went directly to "retry". I took the exteranl dns
entry out and it worked fine.

The puzzle piece here is taht I send mail to the problem domain and
sometimes it goes thru and sometimes it doesnt. If I restart dns on
the mani pdc then the mail to the probelm domain sends right out.

I agree with the article you suggested though because it says "may"
cause problems which leads to believe this is the sporadic nature I
am witnessing.

The company that the pd has to have, in that zone there is the mail
server with an internal 10.x address but from the outside world it is
the same server name but with a valid outside address.

So mail for that domain is not getting to the exteranl dns portion
because it sees it in the internal dns zone. This is one of those
bizarre configuartions whereby the company that is giving me grief is
the one that is hosting the MX record for the problem domain. They
told me I should setup a relay on my mail server and I told them no.
Any other ideas?

If you have a zone for this domain in your internal DNS, your DNS would not
even try the Public DNS for the domain because it would have authority over
the name. You'll need to create an MX record in that zone, pointing to an A
record that has the external IP the mail server can be reached on.



--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps

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