Can someone explain me Exchange NDR ? I have some GFI ME related problem.

Hello

I have a strange problem where the NDR messages sent by my Exchange internally are being caught by GFI MailEssentials anti-spam module.

Can someone please explain me what is the nature of Exchange NDR ? GFI MailEssentials anti-spam module can only process SMTP traffic. Does it mean they are SMTP messages ? GFI anti spam is suppose to only catch messages coming from outside, yet, somehow, its also affecting Exchange non delivery reports.
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tp-it-teamAsked:
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CaptainGibletsCommented:
in gfi configuration

under general > general settings > email domain

is your internal domain name in this list?
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SreRajCommented:
Hi,

Please refer the following article.

http://kbase.gfi.com/showarticle.asp?id=KBID003322
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tp-it-teamAuthor Commented:
Yes, my domain is on the list.
That article explains how to protection from backscattering works in GFI, however, I'm not sure how it can help me in my situation.
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CaptainGibletsCommented:
if your domain Is in the list GFI will scan internal emails also.
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SreRajCommented:
GFI MailEssentials scans all NDR emails by default. This functionality is controlled by the ASE_SCANDSN (dword) value which is enabled by default (set to ‘1’. If this registry key is set to ‘0’, GFI MailEssentials will not perform any scanning on NDR messages.) Restiry key is avaialble in the following path based on OS type - 32 bit or 64.

HKLM\SOFTWARE\GFI\ME<version>\Config
HKLM\Software\Wow6432Node\ME<version>\Config

I feel there is no option to add an exception so that it does not scan messages generated for your domain.
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tp-it-teamAuthor Commented:
I guess my internal domain should be there as other GFI modules are scanning internal emails. I'm just surprised that internal NDR are scanned. It's such a basic thing. Sometimes I feel like I'm the only guy on the planet using GFI software with exchange 2007, having such basic problems, like no one before me reported them...
What mechanism is used to send internal NDRs ?
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Simon Butler (Sembee)ConsultantCommented:
On Exchange 2007 and higher all email goes through Transport, which means SMTP. If you look at a message sent to you by someone on the same Exchange server you will see SMTP headers as Exchange processes it.

Simon.
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tp-it-teamAuthor Commented:
So just to clarify, NDRs are just internal SMTP emails ?
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Simon Butler (Sembee)ConsultantCommented:
They are indeed. They are special messages, but they are SMTP emails like everything else.

Simon.
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