IIS SMTP behind NAT does not send messages

Hi,
I have a small SMC7004 router with a public IP and
a set of privates IP behind it (192.168.0.X)

I have a IIS SMTP server running in a Windows 2000 professional
but the messages can not be delivered because the SMTP server said
it cannot resolve the destination domain.

I testet from outsite the port 25 and it is ok mapped and the server
responded ok, but it seems a problem with the DNS.

The IIS SMTP machine is configured to use as DNS server the
router address.

What is wrong?

Regards
Mauricio

On Fri, 16 Jul 2004 15:34:02 -0400, "MLumbrer"
<mlumbrer RemoveThis @lacapitalnet.com.ar> wrote:

 >Hi,
 >I have a small SMC7004 router with a public IP and
 >a set of privates IP behind it (192.168.0.X)
 >
 >I have a IIS SMTP server running in a Windows 2000 professional
 >but the messages can not be delivered because the SMTP server said
 >it cannot resolve the destination domain.
 >
 >I testet from outsite the port 25 and it is ok mapped and the server
 >responded ok, but it seems a problem with the DNS.
 >
 >The IIS SMTP machine is configured to use as DNS server the
 >router address.
 >
 >What is wrong?

Your DNS setup most likely. Try a NSLookup on athe MX record of the
destination domain from the server. See a DNS group for details on
doing this.

Jeff<!-- ~MESSAGE_AFTER~ -->