Unable to send and receive once I added a router

lmartin2002
lmartin2002 used Ask the Experts™
on
Hi all, I have added a Microsoft MN500 router to my network.  After this happened, mail can no longer be sent or received from the server.  The server is obtaining an ip address from the router and internet connectivity works fine.  When I try to send an email to the domain from Yahoo, here is what I get...

Message from  yahoo.com.
Unable to deliver message to the following address(es).

<administrator@mydomain.us>:
68.1.1.1 does not like recipient.
Remote host said: 550 5.7.1 Unable to relay for
administrator@mydomain.us
Giving up on 68.1.1.1.

The items I send just stay in the outbound queue.  I have opened up ports 25, 110, and 53 for both TCP and UDP traffic, as well as place the internal IP of the server in the DMZ zone.  I do not know what else to do.  Does anyone have any suggestions?

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David WilhoitSenior Consultant, Exchange

Commented:
Did you map the ports to your server? Has your IP address changed? Can you telnet to port 25 from the ouside world to your mail server?

Author

Commented:
I mapped 25 110 and 53 to the server.  Why do you think that it would not be able to send out though?

Author

Commented:
I mapped 25 110 and 53 to the server.  Why do you think that it would not be able to send out though?
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David WilhoitSenior Consultant, Exchange

Commented:
Like I said, can you telnet to port 25 on the exchange server?
David WilhoitSenior Consultant, Exchange

Commented:
did the Exchange server's IP address change?

Author

Commented:
No, the IP didn't change.  Unfortuneatly I don't have the resources now to check to see if I can telnet to port 25.  Could you try to connect to port 25 on my server if I provide the host name?

Author

Commented:
No, the IP didn't change.  Unfortuneatly I don't have the resources now to check to see if I can telnet to port 25.  Could you try to connect to port 25 on my server if I provide the host name?
David WilhoitSenior Consultant, Exchange

Commented:
yes, post it, I'll give it a shot

Author

Commented:
it's geomail.us is the domain name and my server is snt2kdc1.  The internal domain that was set up is home.com but I also have another domain set up in dns on that server for geomail.us that has a MX record that points to snt2kdc1.home.com.
Senior Consultant, Exchange
Commented:
ok, the IP address I came up with, and connected to, was 68.82.41.150. this is where the MX record points. your NDR read 68.1.1.1. I have no idea what this is, but I believe that's your problem. check your internal DNS, make sure everything is clean.

Author

Commented:
I am able to send out emails now that I have stopped routing and remote access, I was using it when I had Citrix installed.  I am still unable to recieve emails.  Could you try to get another NDR and see what it reads?
David WilhoitSenior Consultant, Exchange

Commented:
i sent an email to administrator@geomail.us, and it hasn't come back. Reply when you receive it.

Author

Commented:
I found out it was DNS settings, everything works now.

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