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It was enable by default. The default accepted domain, &quot;allow non delivery report&quot; was enabled.<br />
<br />
Please have a read of NDR based on below link.<br />
<br />
<a href="http://technet.microsoft.com/en-us/library/bb232118%28v=exchg.150%29.aspx" rel="ugc">http://technet.microsoft.com/en-us/library/bb232118%28v=exchg.150%29.aspx</a>
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It was enable by default. The default accepted domain, "allow non delivery report" was enabled.

Please have a read of NDR based on below link.

http://technet.microsoft.com/en-us/library/bb232118%28v=exchg.150%29.aspx [http://technet.microsoft.com/en-us/library/bb232118%28v=exchg.150%29.aspx]

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im more concerned about the external users - shouldn't they be receiving &nbsp;NDR's? Should my Hosted email security be taking care of this..
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im more concerned about the external users - shouldn't they be receiving  NDR's? Should my Hosted email security be taking care of this..

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if the sender is not getting a NDR when going through the smart host - would this be an issue with the hosted email security ?
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if the sender is not getting a NDR when going through the smart host - would this be an issue with the hosted email security ?

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Hi All,<br />
By default do I need to configure NDR within Exchange 2013?<br />
When I use send connector &quot;mx record associated with recipient domain&quot; NDR's work fine but when I use &quot;Route mail through smart hosts&quot; using the hosted email security or ISP IP NDRs don't work - seems like exchange accepts the email..or is there a delay of a few hours??
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Hi All,
By default do I need to configure NDR within Exchange 2013?
When I use send connector "mx record associated with recipient domain" NDR's work fine but when I use "Route mail through smart hosts" using the hosted email security or ISP IP NDRs don't work - seems like exchange accepts the email..or is there a delay of a few hours??

NDR Exchange 2013

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.