Re: Exchange 2003 SBS #4.4.7 NDR TO OUR SERVER

Hi Jeff,

Thanks for using the SBS newsgroup. Also thanks for N. Hughes's input.

I am sorry for the delayed response due to weekend. Please understand that
the newsgroups are staffed weekdays by Microsoft Support professionals to
answer your systems and applications questions. Your understanding is
greatly appreciated!

For time critical issues (not business down), we encourage you to contact
CSS directly for more immediate assistance:
International Support (non-US/Canada):
http://support.microsoft.com/common/international.aspx

US and Canada:
http://support.microsoft.com/default.aspx?scid=fh;EN-US;OfferProPhone

To continue working with me in the newsgroups, please see the following:

From your description, I understand the issue is that users from some
external domains received 4.4.7 NDR messages while sending emails to your
exchange server. If I am off base, please don't hesitate to let me know.

Based on my research, the NDR code typically indicates an issue on the
receiving server. Let us follow the steps below to trouble shoot the issue:

#1:
-----------
Based on my research, this issue may occur due to firewalls or antivirus
software configured on the Exchange Server side, such as Symantec Antivirus
Corporate Edition 9.x. Therefore, I would suggest that we temporarily
disable all third party firewall/antivirus and on Exchange and check
whether this issue disappears.

Also please look into the following article to get more information about
the issue:

SMTP mail cannot be sent or cannot be received in Exchange Server
http://support.microsoft.com/?id=895857

#2:
-----------
Check whether the external MX record/A record of your mail server is
configured on your external DNS.

1. In Exchange System Manager, open the property page of Default SMTP
Virtual Server.
2. Click on the Delivery tab, and click on Advanced button
3. Click on the Configure button next to "Configure external DNS Servers"
4. If there are External servers listed in this dialog box remove them.
5. Restart the Default SMTP Virtual Server

#3:
-----------
Have you enabled the Sender Filtering feature in Exchange server? If you
enabled the Sender Filtering feature on the Simple Mail Transfer Protocol
(SMTP) virtual server in Exchange Server 2003, some messages that are sent
by users of Microsoft Office Outlook 2003 are not delivered by the server.
And
error message is similar to the following error message:
4.4.7 Dropping connection due to an error on this server.

If it is the situation, you need apply a hotfix to resolve the issue.
Please check the following article to get detail information:

Some e-mail messages that are sent by Outlook 2003 users are not delivered
after you enable the Sender Filtering feature in Exchange Server 2003, and
message senders may receive a non-delivery report message
http://support.microsoft.com/?id=901160

#4:
-----------
What is the service packs level of the Exchange server and the SBS 2003? If
you have applied the SBS 2003 SP1 to the server box, please try to apply
the hotfix 898060 to see if it helps.

More detail information addressed in the following KB article:
898060 Installing security update MS05-019 or Windows Server 2003 Service
Pack
http://support.microsoft.com/?id=898060

If the issue persists, please help me collect the following information for
further analyze the issue:

1. How you configured the Exchange server send/receive emails? Using DNS or
smarthost?

2. Does the issue still happen when you routed all SMTP Traffic through our
ISP?

3. Please save some samples of the NDR messages as .msg files and send to
my working mailbox:v-yanniw@xxxxxxxxxxxxxx

4. You can mail me the SMTP log file to me for analyze.

Note: Please let me know the message sender address, recipient and the time.

5. Please use the SMTPDiag tool to diagnose configuration and connection
issues involving SMTP and DNS. Please download the tool via the following
link:

Exchange Server SMTPDiag Tool
http://www.microsoft.com/downloads/details.aspx?familyid=bc1881c7-925d-4a29-
bd42-71e8563c80a9&displaylang=en

More information:
Delivery status notifications in Exchange Server and in Small Business
Server
http://support.microsoft.com/kb/284204

Hope above information helps. I am happy to be of assistance to you and
look forward to your reply.

Have a nice day!

Sincerely,

Jenny Wu
Microsoft CSS Online Newsgroup Support
Get Secure! - www.microsoft.com/security
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--------------------
From: "N. Hughes" <quadrantcomputerNOSPAM@xxxxxxxxxxx>
References: <1152483295.745514.4700@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: Exchange 2003 SBS #4.4.7 NDR TO OUR SERVER
Date: Mon, 10 Jul 2006 12:02:35 +1000
Lines: 42
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2900.2869
X-RFC2646: Format=Flowed; Original
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869
Message-ID: <#MkAhT8oGHA.4848@xxxxxxxxxxxxxxxxxxxx>
Newsgroups: microsoft.public.windows.server.sbs
NNTP-Posting-Host: 218-214-129-136.people.net.au 218.214.129.136
Path: TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSFTNGP03.phx.gbl
Xref: TK2MSFTNGXA01.phx.gbl microsoft.public.windows.server.sbs:280144
X-Tomcat-NG: microsoft.public.windows.server.sbs

Any other messages error messages?

If you are using the DNS service to send your mail, you need to confirm
whether you have a "real" static IP or a "leased" static IP? The problem
is
becoming more widespread - lthe cheaper leased IPs are treated as Dynamic
IPs and may be bounced by those email servers which perform reverse-DNS
lookups.

The only recourse is to get a "real" static IP, or use your ISP's mail
server for outbound forwarding.

Regards,
N. Hughes

<jaellman@xxxxxxxxx> wrote in message
news:1152483295.745514.4700@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I've got a situation where my client is telling me (and I've seen) a
few domains are unable to send email to us without getting 4.4.7 errors
returned to the sender. I've disabled all incoming mail filters (IMF)
on the exchange server, from the outside world from multiple IP
addresses I can telnet to 25 to the mail server as well as MANY MANY
MANY users are able to send mail to this exchange server, only a few
cannot.

I'm looking for some general guidance on where I can look from here to
figure this out.

I've done the following:
-Disabled SMTP filtering on Exchange
-Disabled SMTP FIltering on PIX
-Routed all SMTP Traffic through our ISP via Virtual Server (there is
no SMTP Connector)
-Checked SMTP logs and found NO CONNECTIONS from these domains
attempting to send mail to us
-Check DNSREPORT for any DNS errors on our DNS Server...

Anything else I can look for?!? Thanks!

~Jeff





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