Random mail rejections from other domains

Exchange 2000

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Random mail rejections from other domains

Postby ZGZicmFkbGV5 » Fri, 07 Jan 2005 01:29:04 GMT

Exchange 2003 when users send mail to certain domains (especially hotmail and 
msn) it is randomly rejected. I have set up test accounts and they usually 
work but users continue to complain and give me printouts with error number 
4.4.7 couldn't be delivered. I have checked our DNS and everything is in 
order. Any ideas on where I should be looking at this point ? Thanks in 
advance for the help.

Re: Random mail rejections from other domains

Postby Jerome » Fri, 07 Jan 2005 04:09:13 GMT

Hotmail servers are usually extremely busy and most of the time they don't accept the message on the first attempt. Make 
sure that the retry interval on your Exchange is long enough.

Re: Random mail rejections from other domains

Postby ZGZicmFkbGV5 » Fri, 07 Jan 2005 04:21:04 GMT

I had left the delivery settings at default 10 minutes each for first 3 
retries then 15 minutes for each after. I changed them to 10 for first retry, 
20 for the second and third and 30 minutes for subsequent retries. Can you 
think of any other reason the mail would not get delivered?

Re: Random mail rejections from other domains

Postby Jason » Fri, 07 Jan 2005 04:38:14 GMT

Are you running  a PIX firewall?  There is a problem with a certain version
the PIX software that causes EDNS issues.  Where domains like yahoo and msn
will not show up in DNS from time to time, but it is hit and miss and is
hard to trouble shoot.  The solution was turning off EDNS on the DNS server
until we upgrade the PIX software.


don't accept the message on the first attempt. Make

hotmail and

Re: Random mail rejections from other domains

Postby Jason » Fri, 07 Jan 2005 04:43:32 GMT

Link to what I was talking about.  When I did the switch on the DNS server,
the performance jumped like 300%  It was night and day with response time.

 http://www.**--****.com/ ;en-us;828731




Similar Threads:

1.Change in Smart Host and random rejection

Exchange 2000 on a Win2K server, with latest SPs.

When this Exchange server was fist setup we had it use our ISPs Smart Host.
However we had problems with that and removed the Smart Host from our

We will periodically get messages rejected saying, "Relay not allowed".
When I check the logs I see that our server has past the message to the
Smart Host that it USED to be configured for and the receiving server
perceives it as a relay. Also this only happens when the sender uses an
address list. If we send to just the rejected address there is no problem,
our server gives it to their server.

And it does not happen Every time. Yesterday message sent to same list and
my server gave it to their server. Today another message to same list, same
user, and my server tries to relay?????????????

Can someone offer any pointers. Maybe tell me where that old Smart Host info
might be hiding so I can clean/delete it.
Thanks for your Time.
Remove the kNOT to reply.
But it is best to share it with the group.

2.Duplicate E-mail on random domain accounts

We've been having a problem in our domain with random account receiving 
duplicate msgs and outlook not removing any msgs from the server (POP3 
I've found that when we change the user over to exchange and pull the msgs 
from the server we don't have that problem any more. We've only had this 
issue on about 30-35 users out of  2,000+. Any ideas on what could be 
causing the problem? 

3.Some users not receiving mail but others in same domain can from same source

I am having some strange behaviour with our Exchange server  and Tony
thought that you might be able to offer some help.

We are currently moving over from an old domain to a new domain, so I
have added the second SMTP email domain to all users and enable the in
the routing tab of the Internet Mail Service connector I have routed
both domains to <inbound>.

The problem is that some of our users, approx 60% can receive mail sent
to the new domain and the other 40% cannot. This is a consistent
result, i.e. those who can receive always receive mail and those who
don't never do.
I have compared the properties, date created, etc, etc of those who can
and cannot receive mail on the new domain and there is nothing that I
can see that shows any difference between the two.

This is the NDR record I receive :-

Your message

Subject: Hi - Reply if you get this
Sent: Thu, 15 Dec 2005 01:52:49 +0100

did not reach the following recipient(s):

 XXXX@XXXXX.COM  on Thu, 15 Dec 2005 01:52:59 +0100
The recipient name is not recognized
The MTS-ID of the original message is:
MSEXCH:IMS:FUGRO:Amstelveen-FGG:MAILEUEX 0 (000C05A6) Unknown Recipient



4.mail not working to one domain, fine to all others


- Exchange2000 server on Win2k server SP3
- Email server is working, has been for 5 months now.
- All email is comming in fine
- All email is going out fine unless sent to 
if sent to  XXXX@XXXXX.COM  mail stays in queue, 
smtp logs stay empty, event logs stay empty.

I can send mail to the user from my personal account 
hosted on an isp so I know the address is good.  

I have configured my smtp to use external DNS servers 
(and tried using without the external dns servers 
configured, just using forwarders on internal dns)

A delay report is generated, then 48 hours later an NDR 
is generated.

All mail from the tmsg.sytexinc.com domain is recieved 
just fine

No MX record exists for tmsg.sytexinc.com (on any 
internet DNS server I could find), however the host 
record points to the firewall this company is using that 
is passing mail back to the email server(raptor firewall).

So the question remains....why will exchange not connect 
and send mail to this domain?  Any help would be greatly 
appreciated as I am at my wits end.  I have contacted the 
tech and he verifys his clients are recieving mail, and 
he is not blocking anonymous traffic from my IP.

I have also established a telnet connection with 
tmsg.sytexinc.com on port 25 and sucessfully sent email 
to this user by manually going through the smtp commands 
from Helo to quit....

I posted in the smtp forum but this one seems more active.

5.Single domain rejection

I am having an NDR issue.  Within the past week we have not been able to 
email to a domain that we have always been able too, and it is the only 
domain that this is happening to us with.   We have not made any changes on 
our side, and we have had the net admin from the other domain check to see if 
there have been any changes on their end, and there have not been any.  

One NDR indicates:  Could not deliver the message in the time limit 
specified.  Please retry or contact your administrator.<ur domaincom 

The second NDR indicates:  This message was rejected due to the current 
administrative policy by the destination server.  Please retry at a later 
time.  If that fails, contact your system administrator.<.  

The other domain receives email from other companies, but not from us.  I 
looked in the Exchange system manager and pulled up some of the offending 
emails to see what was in there.  The following is an excerpt:  
7/13/2005  9:27 AM		 Tracked message history on server ur server
7/13/2005  9:27 AM		  SMTP Store Driver: Message Submitted from Store
7/13/2005  9:27 AM		  SMTP: Message Submitted to Advanced Queuing
7/13/2005  9:27 AM		  SMTP: Started Message Submission to Advanced Queue
7/13/2005  9:27 AM		  SMTP: Message Submitted to Categorizer
7/13/2005  9:27 AM		  SMTP: Started Outbound Transfer of Message
7/13/2005  9:27 AM		   Message transferred out to                            
namicnav1.namic.org through SMTP
7/13/2005  9:18 AM		  The log file '\\namicnav1\Tracking.Log\20050713.log' 
is not available.

7/13/2005  11:29 AM		  SMTP: Non-Delivered Report (NDR) Generated

Sorry if this post appears choppy.  I have not had any luck looking in the 
MSKB, so I am turning to you.  If you have any idea as to what is going on I 
would greatly appreciate a little guidance.  Thank you.


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