RE: Not acceppt mail noexistinguser@mydomain.com

  • From: "Neil Hobson" <Neil.Hobson@xxxxxxxxxxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Thu, 14 Aug 2003 15:55:56 +0100

That's your server generating an NDR as a result of the 5.1.1 message,
so Mark's server never sent an NDR.  I've just telnetted to Mark's
server and manually sent a message to the same address - no NDR
received.

So, you cannot stop the other server from getting a message like that.
The important thing for you is that you are not sending any NDR.

Neil 


-----Original Message-----
From: Cory D. [mailto:coryd@xxxxxxxxx] 
Sent: 14 August 2003 15:51
To: [ExchangeList]

http://www.MSExchange.org/

I did a test Mark and this is what I got back:

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

      Subject:  test
      Sent:     8/14/2003 9:47 AM

The following recipient(s) could not be reached:

      abc@xxxxxxxxxxxxxxxxxxx on 8/14/2003 9:47 AM
            The e-mail account does not exist at the organization this
message was sent to.  Check the e-mail address, or contact the recipient
directly to find out the correct address.
            <mailxserver.euler.com #5.1.1 smtp;550 5.1.1 User unknown>

I do not want them to even get this. I am trying to keep the traffic
down we have been have problems with people hitting us with 1 msg/sec
lating 2-10 min that is to many response back to the orginator. I am
just looking at a way to cut the traffic back to them.

C.

-----Original Message-----
From: Mark Fugatt [mailto:mark@xxxxxxxxx]
Sent: Thursday, August 14, 2003 9:39 AM
To: [ExchangeList]
Subject: [exchangelist] RE: Not acceppt mail noexistinguser@xxxxxxxxxxxx


http://www.MSExchange.org/

Well, I just happen to have a nice little 2003 box sitting here for
testing purposes, all that is generated is the 5.1.1 as Neil mentioned,
if you want to test it send a message to abc@xxxxxxxxxxxxxxxxxxx, this
user does not exist, if you want to see the SMTP verb's being generated
try this:

telnet mail.exchangetrainer.com 25
helo test.com
mail from: fred@xxxxxxxx
rcpt to: abc@xxxxxxxxxxxxxxxxxxx

Hope this helps

Mark Fugatt 
MCT, MCSE, Microsoft Exchange MVP 
Pentech Office Solutions Inc 
Tel:  585 586 3890
Cell: 585 576 4750
Fax:  585 249 0316 
www.4mcts.com 
www.exchangetrainer.com 


-----Original Message-----
From: Cory D. [mailto:coryd@xxxxxxxxx] 
Sent: Thursday, August 14, 2003 10:21 AM
To: [ExchangeList]

http://www.MSExchange.org/

Thanx Neil.   

Yeah, how about it Mark F - :-)

C.

-----Original Message-----
From: Neil Hobson [mailto:Neil.Hobson@xxxxxxxxxxxxxxxxx] 
Sent: Thursday, August 14, 2003 8:57 AM
To: [ExchangeList]
Subject: [exchangelist] RE: Not acceppt mail noexistinguser@xxxxxxxxxxxx


http://www.MSExchange.org/

Well, since no NDR is generated by your server, I don't think anything
is reported back.  I'd have to test to be sure.  And typically, I
rebuilt my test E2k3 server the other day as a 5.5 server for some
testing.  :-(

I'll report back when I get a chance to test again, unless anyone here
has got an E2k3 server handy[1].

Neil 

[1] Mark F - surely you've got one hanging around somewhere!

-----Original Message-----
From: Cory D. [mailto:coryd@xxxxxxxxx] 
Sent: 14 August 2003 14:42
To: [ExchangeList]

http://www.MSExchange.org/

But does it add to traffic back to the originator if the user is not
found. I do not want to acknowledge back to them if it does. Basically
what I am looking for is a way not to respond if that
person(s) are not in the GAL.

C.

-----Original Message-----
From: Neil Hobson [mailto:Neil.Hobson@xxxxxxxxxxxxxxxxx]
Sent: Thursday, August 14, 2003 5:03 AM
To: [ExchangeList]
Subject: [exchangelist] RE: Not acceppt mail noexistinguser@xxxxxxxxxxxx


http://www.MSExchange.org/

I would say that Exchange 2003 has what you're after.  E2k3 has a new
check box called 'Filter recipients who are not in the directory'.  This
means that, at the SMTP verb level, your server generates a '5.1.1 User
Unknown' response to a message to a recipient not in your GAL.  Also, no
NDR is generated.

Neil 


-----Original Message-----
From: Cory D. [mailto:coryd@xxxxxxxxx] 
Sent: 13 August 2003 15:31
To: [ExchangeList]

http://www.MSExchange.org/

That is a nice B-Log.
But how can I disable NDR's, I am getting hit with people sending
between 1 and 40 spam's/min/connection(as much as 4000) and I do not
want the extra traffic of a NDR. I have already unchecked "allow
delivery receipt message" and "allow non-delivery message". What I want
is to be rude and just totally cut it off, like hanging up on a
telemarketer. No response just an empty line. There has to be some sort
of re-direct or reg hack.

-----Original Message-----
From: Ezzeldin, Ezzeldin S. [mailto:ezzeldin@xxxxxxxxxxxxxxxxx]
Sent: Tuesday, August 12, 2003 4:23 PM
To: [ExchangeList]
Subject: [exchangelist] RE: Not acceppt mail noexistinguser@xxxxxxxxxxxx


http://www.MSExchange.org/

Check this link. Hope that what you are looking for.

http://hellomate.typepad.com/exchange/2003/07/dealing_with_ba.html


Thanks,
Ezzeldin


-----Original Message-----
From: Cory D. [mailto:coryd@xxxxxxxxx] 
Sent: Tuesday, August 12, 2003 1:26 PM
To: [ExchangeList]
Subject: [exchangelist] RE: Not acceppt mail noexistinguser@xxxxxxxxxxxx

http://www.MSExchange.org/

I would like to hear an answer for this as well, this is happening to me
as well.

Cory D.
email:  mailto:coryd@xxxxxxxxx

-----Original Message-----
From: oskar.ruckle@xxxxxxxxx [mailto:oskar.ruckle@xxxxxxxxx] 
Sent: Monday, August 11, 2003 4:58 AM
To: [ExchangeList]
Subject: [exchangelist] Not acceppt mail noexistinguser@xxxxxxxxxxxx


http://www.MSExchange.org/

Hi!

I have serious amounts of junkmail in the BadMail folder at one of my
customers. The customer is Running Exchange 2000 SP3 and the Relay
protaction is fine as far as I can see!

The problem is that that the badmail foler rapidly builds up with
junkmail addressed bogusmail@xxxxxxxxxxxx, nouser@xxxxxxxxxxxx, (where
mydomain is the correct maildomain, but it can be anything before
"mydomain.com")

The problem is that the server acceppts mail for users/mailboxes that
don't exist during the session and then wants to send an NDR. This
however results in loads of NDR's in the BadMail folder.

Is there any way of forcing Exchange to reject mail during the session
for users/mailboxes that dont exist on the system?

Many thanks in advance!

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