SMTP Virtual Server can not connect to DNS

Hi --

Thanks for the info.

I did the following:
-Using the MetaBase Editor added in SmtpSvc: ID 36997, UT Server, DT DWORD,
Data 2

I restarted the server

When I do a mail send I monitor (with my sniffer) and I see the DNS querries
for thsi are still going as TCP not UDP?

Thanks for any info.


"Wei-Dong Xu [MSFT]" <v-wdxu RemoveThis @online.microsoft.com> wrote in message
news:Z8EWKFLrDHA.1992@cpmsftngxa06.phx.gbl...
 > Hi mBird,
 >
 > The SMTP service of Windows 2000 uses TCP queries to perform DSN lookup by
default. nslookup uses UDP by default. Based on my experience, I'd suggest
 > you can force the SMTP service uses only UDP to locate the dns server by
configuring the metabase. There is one kb article about this issue which
will help
 > you a lot on how to set SMTP using UDP. Though this article applies to
Exchange server 2000, it is also applied to IIS SMTP service. Please go to:
 > 330070 XADM: Mail May Not Be Delivered When DNS Resolution Uses Only the
UDP
<font color=purple> > <a style='text-decoration: underline;' href="http://support.microsoft.com/?id=330070</font" target="_blank">http://support.microsoft.com/?id=330070</font</a>>
 >
 > Furthermore, several KB articles regarding this issue may provide more
information for you. Please go to:
 > 263237 XCON: Windows 2000 and Exchange 2000 SMTP Use TCP DNS Queries
<font color=purple> > <a style='text-decoration: underline;' href="http://support.microsoft.com/?id=263237</font" target="_blank">http://support.microsoft.com/?id=263237</font</a>>
 >
 > Please feel free to let me know if you have any further questions.
 >
 > Does this answer your question? Thank you for using Microsoft NewsGroup!
 >
 > Wei-Dong Xu
 > Microsoft Product Support Services
<font color=purple> > Get Secure! - <a style='text-decoration: underline;' href="http://www.microsoft.com/security</font" target="_blank">www.microsoft.com/security</font</a>>
 > This posting is provided "AS IS" with no warranties, and confers no
rights.
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: SMTP Virtual Server can not connect to DNS 

OK I think I found the problem (with setting to 2 still doing TCP):
In article 330070 (http://support.microsoft.com/?id=330070) it says:
Value: Description:
0x0 UDP followed by TCP upon truncation
0x1 TCP only
0x2 UDP only

BUT!!!!!
In TechNet
<a style='text-decoration: underline;' href="http://www.microsoft.com/technet/treeview/default.asp?url=/technet/prodtechnol/windowsserver2003/proddocs/standard/ref_mb_smtpusetcpdns.asp" target="_blank">http://www.microsoft.com/technet/treeview/default.asp?url=/technet/pro...chnol/w</a>
it says:
The SmtpUseTcpDns property specifies if SMTP uses TCP for DNS. The value can
be 0 (IE UDP only), 1 (TCP only), 2 (try UDP and then TCP), or others.

So I used 0 and it works (forces UDP for DNS lookups) -- is there an error
inthe docs in <a style='text-decoration: underline;' href="http://support.microsoft.com/?id=330070?" target="_blank">http://support.microsoft.com/?id=330070?</a>

Thank you


"mBird" <no.DeleteThis@spam.com> wrote in message
news:rj7ub.115325$ZC4.82944@twister.nyroc.rr.com...
 > Hi --
 >
 > Thanks for the info.
 >
 > I did the following:
 > -Using the MetaBase Editor added in SmtpSvc: ID 36997, UT Server, DT
DWORD,
 > Data 2
 >
 > I restarted the server
 >
 > When I do a mail send I monitor (with my sniffer) and I see the DNS
querries
 > for thsi are still going as TCP not UDP?
 >
 > Thanks for any info.
 >
 >
 > "Wei-Dong Xu [MSFT]" <v-wdxu.DeleteThis@online.microsoft.com> wrote in message
 > news:Z8EWKFLrDHA.1992@cpmsftngxa06.phx.gbl...
  > > Hi mBird,
  > >
  > > The SMTP service of Windows 2000 uses TCP queries to perform DSN lookup
by
 > default. nslookup uses UDP by default. Based on my experience, I'd suggest
  > > you can force the SMTP service uses only UDP to locate the dns server by
 > configuring the metabase. There is one kb article about this issue which
 > will help
  > > you a lot on how to set SMTP using UDP. Though this article applies to
 > Exchange server 2000, it is also applied to IIS SMTP service. Please go
to:
  > > 330070 XADM: Mail May Not Be Delivered When DNS Resolution Uses Only the
 > UDP
<font color=green>  > > <a style='text-decoration: underline;' href="http://support.microsoft.com/?id=330070</font" target="_blank">http://support.microsoft.com/?id=330070</font</a>>
  > >
  > > Furthermore, several KB articles regarding this issue may provide more
 > information for you. Please go to:
  > > 263237 XCON: Windows 2000 and Exchange 2000 SMTP Use TCP DNS Queries
<font color=green>  > > <a style='text-decoration: underline;' href="http://support.microsoft.com/?id=263237</font" target="_blank">http://support.microsoft.com/?id=263237</font</a>>
  > >
  > > Please feel free to let me know if you have any further questions.
  > >
  > > Does this answer your question? Thank you for using Microsoft NewsGroup!
  > >
  > > Wei-Dong Xu
  > > Microsoft Product Support Services
<font color=green>  > > Get Secure! - <a style='text-decoration: underline;' href="http://www.microsoft.com/security</font" target="_blank">www.microsoft.com/security</font</a>>
  > > This posting is provided "AS IS" with no warranties, and confers no
 > rights.
  > >
  > >
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: SMTP Virtual Server can not connect to DNS 

Hi mBird,

Thanks very much for your feedback. I have submitted it to our content team and logged the status into our internal database. Our content team is
working on it now. We are looking at continual improvement and look forward to building better products with helpful feedbacks such as yours.

Please feel free to let me know if there is any I can do for you.

Thank you for using Microsoft NewsGroup!

Wei-Dong Xu
Microsoft Product Support Services
Get Secure! - www.microsoft.com/security
This posting is provided "AS IS" with no warranties, and confers no rights.
 >> Stay informed about: SMTP Virtual Server can not connect to DNS