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Microsoft Exchange 2007 Receive Problems

Last Modified: 2013-11-30

Curerntly setting up an Exchange server for a child domain. This is an issue with a new installation of Exchange 2007 on a Server 2003 OS.

I have all pretty much everything configured on the Exchange Server including accepted domains, MX records set up from the domain service provider and mail being sent and received internally to recipients on the same domain. I also have mail being sent out to remote domains such as to hotmail accounts. The problem that I have is that I cannot receive mail from external domains such as hotmail.com. I have used telnet (server) 25 both internally and externally to find that the ports are indeed open. Is there something glaringly obvious I'm missing?

Using zone edit to do a quick smtp test however, shows that there is an error somewhere along the line and I'm not sure what it is or how to find and fix it. Any help would be greatly appreciated.

Thanks for your time
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Oh I've also ensured the receive connector is set to anonymous for the default (server)
Expert of the Quarter 2009
Expert of the Year 2009

When you telnet in to the server can you actually send an email? If something is stopping it you should get an NDR message.



telnet works fine.. on some of the accounts, I'm getting an NDR saying there's a few ambiguous addresses which I'm looking into at the moment.. some mail has started to get through but is taking a while to get through..

Not sure if there's a problem with certain domains.. trying to look into PTR records for the domain but DNS record generators provide exactly the same results as what I'd already entered so not entirely sure whats going on with it

Expert of the Quarter 2009
Expert of the Year 2009

Without knowing exactly what the NDRs say, it is impossible to answer further. I failed my long distance minding reading exam at school.



Hi sorry about that..

" There is a problem with the recipient's e-mail system. More than one user has this e-mail address. The recipient's system administrator will have to fix this. Microsoft Exchange will not try to redeliver this message for you. Please provide the following diagnostic text to your system administrator and then try resending the message after the problem has been resolved. "

Diagnostic information for administrators:
Generating server: name.Child.Parent.local
 #550 5.1.4 RESOLVER.ADR.Ambiguous; ambiguous address ##
Original message headers: Received: from 213.123.248.xxx (192.xxx.1.2) by
 name.Child.Parent.local (192.x.x.1) with Microsoft SMTP
 Server id; Fri, 13 Nov 2009 18:06:03 +0000
Subject: This is a test
MIME-Version: 1.0
Content-Type: text/plain
From: <user.name@domain.com>
To: Undisclosed recipients:;
Return-Path: user.name@parentdomain.com
Date: Fri, 13 Nov 2009 18:06:03 +0000

Sorry but I've replaced some of the domain details with Child and Parent amongst other things.

Apologies for assuming everyone could mind read!

Expert of the Quarter 2009
Expert of the Year 2009

The error normally means what it says. There are two objects with the same email address.
Remember that Exchange email addresses are forest wide, so if you Exchange elsewhere in the forest with email addresses for the child domain then you could end up with duplication.

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