RE: NDRs to certain domains.

From: Robert Lampkin [MSFT] (rlampkin_at_online.microsoft.com)
Date: 08/24/04 

Date: Tue, 24 Aug 2004 00:09:56 GMT

The External DNS settings on the SMTP VS are usually used to test if
Internal DNS is working. This setting on the SMTP VS overrides the internal
DNS configuration and uses the DNS servers in here for external resolution.
It can be configured like this but Microsoft recommends that you use this
only for testing.

Robert Lampkin, MCSE: Messaging
Microsoft Exchange Support
************
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--------------------
| Content-Class: urn:content-classes:message
| From: "Jason" <anonymous@discussions.microsoft.com>
| Sender: "Jason" <anonymous@discussions.microsoft.com>
| References: <223d201c45d26$ecb82cd0$a301280a@phx.gbl>
<shhs6qVXEHA.304@cpmsftngxa10.phx.gbl>
| Subject: RE: NDRs to certain domains.
| Date: Wed, 30 Jun 2004 06:53:14 -0700
| Lines: 103
| Message-ID: <232df01c45ea9$96d2d520$a601280a@phx.gbl>
| MIME-Version: 1.0
| Content-Type: text/plain;
| charset="iso-8859-1"
| Content-Transfer-Encoding: 7bit
| X-Newsreader: Microsoft CDO for Windows 2000
| thread-index: AcReqZbSq85YLUQfS3itJkd2KNTExg==
| X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4910.0300
| Newsgroups: microsoft.public.exchange2000.connectivity
| Path: cpmsftngxa06.phx.gbl
| Xref: cpmsftngxa06.phx.gbl
microsoft.public.exchange2000.connectivity:18200
| NNTP-Posting-Host: tk2msftngxa14.phx.gbl 10.40.1.166
| X-Tomcat-NG: microsoft.public.exchange2000.connectivity
|
| Hi,
|
| Thank you for your reply. Why is it that you don't
| configure external DNS server for the SMTP server? I
| thouhgt that that is what that page is there for. I
| shall remove the IP addresses from that list and test
| outbound mail. Why does this cause the problem.
|
| I also have Symantec 9.x installed (client) and have now
| intstalled the server version and cinfigured it per their
| instructions.
|
| I am still confusedas to why I shouldn't use the external
| DNS servers page of the SMTP server's properties.
|
| Kindest regards,
|
| Jason
| >-----Original Message-----
| >What type of AV do you have? If it is Symantec 9.x they
| have a fix for it.
| > (Auto-Protect feature)
| >If not there may be a problem with your external DNS
| servers (Forwarders)
| >resolving the name properly.
| >Make sure you do not have DNS servers listed under the
| SMTP Virtual Server
| >properties\Delivery\Advanced\Configure button. If so
| remove them and
| >restart the SMTP service in Windows services.
| >
| >
| >Robert Lampkin, MCSE: Messaging
| >Microsoft Exchange Support
| >************
| >Please reply directly to the thread with any updates.
| You may receive this
| >email notification before you are able to view my reply
| in the newsgroup.
| >Please do not send email directly to this alias. This
| alias is for
| >newsgroup purposes only.
| >This posting is provided "AS IS" with no warranties, and
| confers no rights.
| >--------------------
| >| Content-Class: urn:content-classes:message
| >| From: "Jason" <anonymous@discussions.microsoft.com>
| >| Sender: "Jason" <anonymous@discussions.microsoft.com>
| >| Subject: NDRs to certain domains.
| >| Date: Mon, 28 Jun 2004 08:45:23 -0700
| >| Lines: 25
| >| Message-ID: <223d201c45d26$ecb82cd0$a301280a@phx.gbl>
| >| MIME-Version: 1.0
| >| Content-Type: text/plain;
| >| charset="iso-8859-1"
| >| Content-Transfer-Encoding: 7bit
| >| X-Newsreader: Microsoft CDO for Windows 2000
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| >| Newsgroups: microsoft.public.exchange2000.connectivity
| >| Path: cpmsftngxa10.phx.gbl
| >| Xref: cpmsftngxa10.phx.gbl
| >microsoft.public.exchange2000.connectivity:18321
| >| NNTP-Posting-Host: tk2msftngxa11.phx.gbl 10.40.1.163
| >| X-Tomcat-NG: microsoft.public.exchange2000.connectivity
| >|
| >| Here is a copy of one:
| >|
| >| There was a SMTP communication problem with the
| >| recipient's email server. Please contact your system
| >| administrator.
| >| <srvr3.toray-tel.co.uk #5.5.0>
| >|
| >| I have noticed that with another problematic domain
| that
| >| on some days we couldn't get any mails through. Our
| >| server would send back NDRs saying that the message
| has
| >| not been delivered but the server would continue to
| >| attempt to send the message. And finally it woudl
| come
| >| back failed. If it came back saying that it would
| still
| >| continue to try delivering the message, it would
| >| invariabley fail. I noticed they only had one mail
| >| server and no backup to cache mails when the server
| was
| >| down. I thought that was all it is, but as the user
| >| pointed out we were fine before the change to
| Exchange.
| >| So I upped the time-out and retry periods and now
| mails
| >| are going through first time.
| >|
| >| It is all really odd. Please help.
| >|
| >| Jason
| >|
| >|
| >
| >.
| >
|