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Thanks, I'll look into that asap.
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I have a client with SBS 2011, using Exchange, no POP mailbox downloading. &nbsp;One person in the organization received an email that looked like it was a spoofed address that was sent from outside the network and routed through the exchange server to the person in the organization. &nbsp;After a short amount of research I discovered this command:<br />
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Get-ReceiveConnector “My Internet ReceiveConnector” | Get-ADPermission -user “NT AUTHORITY\Anonymous Logon” | where {$_.ExtendedRights -like “ms-exch-smtp-accept-autho<wbr />ritative-d<wbr />omain-send<wbr />er”} | Remove-ADPermission<br />
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This evidently close the loophole, but caused another problem unexpectedly. &nbsp;I need to reverse this command, but not sure how to. &nbsp;I tried replacing &quot;Remove-ADPermission&quot; with &quot;Add-ADPermission&quot;, but it didn't seem to do anything. &nbsp;Any ideas?
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I have a client with SBS 2011, using Exchange, no POP mailbox downloading.  One person in the organization received an email that looked like it was a spoofed address that was sent from outside the network and routed through the exchange server to the person in the organization.  After a short amount of research I discovered this command:

Get-ReceiveConnector “My Internet ReceiveConnector” | Get-ADPermission -user “NT AUTHORITY\Anonymous Logon” | where {$_.ExtendedRights -like “ms-exch-smtp-accept-authoritative-domain-sender”} | Remove-ADPermission

This evidently close the loophole, but caused another problem unexpectedly.  I need to reverse this command, but not sure how to.  I tried replacing "Remove-ADPermission" with "Add-ADPermission", but it didn't seem to do anything.  Any ideas?

Need to reverse an Exchange Shell Command!

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.