?
Solved

Undeliverable Mail Messages..

Posted on 2006-11-05
19
Medium Priority
?
392 Views
Last Modified: 2008-02-01
I am running Exchange Server as part of Small Business Server 2003 and have started getting email messages saying...

"Your message did not reach some or all of the intended recipients.

      Subject:      hi Lesley.
      Sent:      05/11/2006 03:06

The following recipient(s) could not be reached:

      iamjustsendingthisleter@MY_DOMAIN.COM on 05/11/2006 06:56
            A configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded between two recipients.  Contact your administrator"

(where MY_DOMAIN.COM is my actual domain name used...)
         

I assume this is some sort of spam related issue because all the addresses are using my domain name and just replacing the first part of the email address each time. I am getting about 7 or 8 a day now. Is there anything that might be causing this that I can resolve?

I am using Avast Antivirus on the server and client pc's..

dc
0
Comment
Question by:dercoss
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 13
  • 5
19 Comments
 
LVL 8

Accepted Solution

by:
nitadmin earned 1000 total points
ID: 17876640
No, this is not spam e-mail.

Your exchange server is not configured correctly.
Please check Default SMTP Virtual Server configurations and the Connector configurations.

Cheers,
NITADMIN
0
 

Author Comment

by:dercoss
ID: 17876788
What am I looking for in particular?

dc
0
 

Author Comment

by:dercoss
ID: 17876877
I've had a dig about and I've found that the emails are all related to 4 virtual SMTP servers that I can see when I got to SERVERS -QUEUES. Should these virtual servers be here at all? They are nothing to do with my server..

dc
0
Is Your AD Toolbox Looking More Like a Toybox?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

 
LVL 7

Expert Comment

by:Pushpakumara Mahagamage
ID: 17880461
some time it may be a Reverse NDR attack. check your NDR rules if any.

and do you have spam filter on your exchange? http://www.microsoft.com/technet/prodtechnol/exchange/downloads/2003/imf/default.mspx

pk
0
 

Author Comment

by:dercoss
ID: 17880688
I don't have any NDR rules that I know of. Where would I check for them? I don't have any 3rd party spam filer running either. I have Avast Antivirus fro SBS 2003 installed but I don't think that has a spam filter on it..

dc
0
 
LVL 7

Assisted Solution

by:Pushpakumara Mahagamage
Pushpakumara Mahagamage earned 1000 total points
ID: 17880845
0
 

Author Comment

by:dercoss
ID: 17884151
I've worked though the Microsoft suggestions above and so far I haven't had the problem happen reappear. I'll get back tomorrow with an update..

dc
0
 

Author Comment

by:dercoss
ID: 17884210
Ignore the "happen" between "problem" and "reappear"... oops..

dc
0
 

Author Comment

by:dercoss
ID: 17896746
Hmm. The problem is still there.

I have worked through some of the above and it appears that when I run Telnet as suggested  I get the following

250 2.1.5 user@spam.com

This apparently means my exchange server is an open smtp relay.

I have worked through the steps to stop this but it seems to make no difference. In fact, the settings are just as the article describes them.

What could I be doing wrong here??

dc
0
 

Author Comment

by:dercoss
ID: 17896774
Also, under the PROTOCOLS - SMTP - DEFAULT SMTP SERVER - PROPERTIES - ACCESS, there is an entry for the the internal IP addrress of the server (192.168.0.6) and also one for 127.0.0.1. Is this correct?

dc
0
 
LVL 7

Expert Comment

by:Pushpakumara Mahagamage
ID: 17897020
you should close relay if it's not relevent for your issue..

at my exchange server i have selected only the list below and the list is empty, and selected allow all computers which sussesfully ath....

pk
0
 
LVL 7

Expert Comment

by:Pushpakumara Mahagamage
ID: 17897068
0
 

Author Comment

by:dercoss
ID: 17897128
That's the kb I worked through but I must be doing something wrong because the SMTP Open Relay is apparently still there...

dc
0
 
LVL 7

Expert Comment

by:Pushpakumara Mahagamage
ID: 17897180
why do you add 127.0.0.1 ? and what happend when you remove 127.0.0.1

pk
0
 

Author Comment

by:dercoss
ID: 17897422
I don't remember adding it. I have taken in out to see what happens.. I'll be back..

dc
0
 

Author Comment

by:dercoss
ID: 17900972
I've now found that some of the emails leaving my network get "stuck" on the Exchange Server. If I go into the Queue I can see some emails on various SmallBusiness SMTP Connectors. If I right click and select "force connection" and then refresh it seems the emails are then sent.

I am getting more confused by the day here...

dc
0
 

Author Comment

by:dercoss
ID: 17908715
And now my email seems to have dried up completely...

dc
0
 

Author Comment

by:dercoss
ID: 17915792
I seem to have solved the problem by deleting the existing SMTP connector and running the CEICW again. I think the DNS servers were originally part of the problem. Apparently they should have been changed to new ones according to my ISP. I think my fiddling around just made the problem worse..

I'll see how it goes over the next day..



dc
0
 

Author Comment

by:dercoss
ID: 17921510
A day later and all still seems ok..

dc
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article will help to fix the below error for MS Exchange server 2010 I. Out Of office not working II. Certificate error "name on the security certificate is invalid or does not match the name of the site" III. Make Internal URLs and External…
The core idea of this article is to make you acquainted with the best way in which you can export Exchange mailbox to PST format.
how to add IIS SMTP to handle application/Scanner relays into office 365.
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

718 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question