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Joe_Budden

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Exchange Authoritative domains

Hello

I'm running Exchange 2007 SP2 in my company. Under remote domains we have loads of domains, and under Accepted Domains we have even more. One of the reasons is that we also relay messages to partner companies.

I want to work out which domains our Exchange system "owns", that is it is purely responsible for. Does anyone know how I can do this?
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Alan Hardisty
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Type the following in the Exchange Management Shell:

get-accepteddomain

That should list the accepted domains and tell you if you are authoritative for them or not.

Accepted Domains which your Exchange system completely "owns" will be the authoritative ones.

The following command, run at Exchange Management Shell, will return a list of all the authoritative domains for you:

Get-AcceptedDomain | where {$_.DomainType -eq "Authoritative"}

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That should be the info you are looking for. Of course, you can use the usual Powershell tools to filter the output accordingly.

-Matt
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Joe_Budden

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Does this mean that only Exchange owns this domain, no one else? Or that Exchange will purely recv and can relay email for this domain?
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Alan Hardisty
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An authoritative domain is one Exchange "owns" entirely. If Exchange receives an inbound message addressed to someone who doesn't exist @myauthoritativedomain.com, then Exchange will bounce the message with an NDR (or flat out terminate the SMTP session mid-flow, if you have the anti-spam agents installed and recipient filtering enabled).

So... the domains in the results of the above command are ones Exchange "owns" entirely.

-Matt
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No probs - Shared SMTP Name Space is a possibility where several servers could receive the mail for a domain then pass it on to another server and then another before it finally gets pushed to the last one which has to be authoritative.