SMTP on IIS5 vs. II6

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vesago73

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We have two servers in our DMZ. Server A is running Windows 2k3. Server
B is running Windows 2K. Both of them have a small script that sends
mail to an SMTP server internal to our network. On the Windows 2k3
server you can refer to the SMTP server using the Netbios name only.
When you do that on the Windows 2k server the piece of mail goes out to
external DNS and does a lookup on our domain then sends the mail in
through our MX records which forces it to go though our Spam filters.
If you specify the FQDN of the SMTP server on the Windows 2k server
then the piece of mail goes straight to the SMTP server. Is there
something in IIS 5.0 that requires a FQDN name versus a Netbios name
and if so, is there anything official that says that??


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Re: SMTP on IIS5 vs. II6

hello,
does the 2 box have same suffix dns set up (on the network card or computer
tab) ?
I don't think iis use the netbios name, but should append the dns suffix
(which for the W2K3 may be your internal dns suffix)
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Cordialement,
Mathieu CHATEAU
http://lordoftheping.blogspot.com


"vesago73" <vesago73.2vosfi@DoNotSpam.com> wrote in message
news:vesago73.2vosfi@DoNotSpam.com...
>
> We have two servers in our DMZ. Server A is running Windows 2k3. Server
> B is running Windows 2K. Both of them have a small script that sends
> mail to an SMTP server internal to our network. On the Windows 2k3
> server you can refer to the SMTP server using the Netbios name only.
> When you do that on the Windows 2k server the piece of mail goes out to
> external DNS and does a lookup on our domain then sends the mail in
> through our MX records which forces it to go though our Spam filters.
> If you specify the FQDN of the SMTP server on the Windows 2k server
> then the piece of mail goes straight to the SMTP server. Is there
> something in IIS 5.0 that requires a FQDN name versus a Netbios name
> and if so, is there anything official that says that??
>
>
> --
> vesago73
> ------------------------------------------------------------------------
> vesago73's Profile: http://forums.techarena.in/member.php?userid=29747
> View this thread: http://forums.techarena.in/showthread.php?t=805466
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> http://forums.techarena.in
>
 
Re: SMTP on IIS5 vs. II6


I checked and everything on there is the same. When I telnet this is
what happens.

Both servers are on the same subnet with the SMTP relay server.

When I telnet from the Windows 2K server to the netbios name of the
SMTP server it responds with our MX Records response. When I telnet to
the SMTP server using the FQDN it responds with the actual server
info.

When I telnet from the Windows 2K3 server to the netbios name and the
FQDN of the SMTP server they both respond with the actual server info.


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