Exchange Server 2007 is trying to send out spam emails.

I cannot find anywhere on my network any viruses or open relays please help as these msg's are beginning to flood in.

Diagnostic information for administrators:
Generating server: #550 5.1.1 <>... User unknown ## Original message headers:
Received: ([]) by ([]) with mapi; Mon, 26 Apr 2010 14:51:55  -0400
From: <user><>
To: "" <>
Date: Mon, 26 Apr 2010 14:51:53 -0400
Subject: [Ticket #8] New Comment: Undeliverable: Malicious object detected
Thread-Topic: [Ticket #8] New Comment: Undeliverable: Malicious object  detected
Thread-Index: AQHK5XGJzcrfh0WAdUu8nlYdBkX+FQ==
Message-ID: <>
Accept-Language: en-US
Content-Language: en-US
acceptlanguage: en-US
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
microsoftexchange329e71ec88ae4615bbc36ab6ce41109e@alicart.local said: Delivery has failed to these recipients or distribution lists:

The recipient's e-mail address was not found in the recipient's e-mail system. Microsoft Exchange will not try to redeliver this message for you. Please check the e-mail address and try resending this message, or provide the following diagnostic text to your  system administrator.
The following organization rejected your message:


Sent by Microsoft Exchange Server 2007

So i ran a test to see if we were an open relay i got these results

220 Microsoft ESMTP MAIL Service ready at Mon, 26 Apr 2010 15:20:39 -0400

Not an open relay.
 0 seconds - Good on Connection time
 5.226 seconds - Warning on Transaction time
 OK - resolves to
 OK - Reverse DNS matches SMTP Banner

Session Transcript:
250 Hello [] [62 ms]
250 2.1.0 Sender OK [47 ms]
550 5.7.1 Unable to relay [5070 ms]
221 2.0.0 Service closing transmission channel [47 ms]
Alicart IT Dept.Asked:
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Are your queues full or empty? Exchange management console --> Toolbox --> queue.

If empty, are you getting these as NDR's to internal users? If so, this is probably just backscatter.

Make sure you have recipient filtering enabled on your exchnange server. Do you use a third party hygiene service, if so, make sure you only accept mail from their IP address.

Alicart IT Dept.Author Commented:
we use appriver for email filtering. as for the receive connector I'm assuming that you mean to set their ip in there correct?

the queue for that domain is there with delivery type dnsconnectordelivery
Alicart IT Dept.Author Commented:
i suspended the queue for that domain but.....
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Yes, make sure only the IP range for appriver are in remote IP of receive connector. This should resolve the problem for you.


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Alicart IT Dept.Author Commented:
I just made the changes, will let you know in a couple hours how it worked Thanks so much for your quick response.....
Alicart IT Dept.Author Commented:
Great Stuff !!!
Alicart IT Dept.Author Commented:
I can already tell its working !!!! Thanks you once again.
Glad I could help,

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