After installing Update Rollup 7 for Exchange Server 2007 (KB953469) all NDR's now come from MicrosoftExchange329e71ec88ae4615bbc36ab6ce41109e@yourdomain.com.
After using ldp.exe to search active directory for the value MicrosoftExchange329e71ec88ae4615bbc36ab6ce41109e@kbomb.com.au I discovered it comes from the attributes MicrosoftExchangeRecipientEmailAddresses and MicrosoftExchangeRecipientPrimarySmtpAddress in the Exchange Organisational Config.
Below is the output of my powershell command Get-OrganizationConfig fl showing you the dodgy email addresses:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4FBvbPv5BaA9Suf-bQVRRE_Vm9CDBKTYdejodKdk_k1oeCKW6IJ1A5sn1X4Sd8FxijNB2tLfCUH_md6RF2twPhNPwxLp79bN-XSJiTHwQywhsm-7Z13Mgs4JB4ZoP94xuNO2K6wNfM1o/s400/exchange2007ndr.jpg)
I also found out by messing around that the bad email address MicrosoftExchange329e71ec88ae4615bbc36ab6ce41109e@kbomb.com.au is being generated by the email address policy.
As a temporary work around until Microsoft releases an official fix, disable the email address policy for the Organization Config email address:
Set-OrganizationConfig -MicrosoftExchangeRecipientEmailAddressPolicyEnabled $false
Then set the MicrosoftExchangeRecipientPrimarySmtpAddress address back to MicrosoftExchange@yourdomain.com or whatever you want it to be. I personally prefer postmaster as it's the internet standard for NDR's that most mailservers follow.
Set-OrganizationConfig -MicrosoftExchangeRecipientPrimarySmtpAddress postmaster@kbomb.com.au
Now my NDR's are coming from postmaster@kbomb.com.au. Much better!
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh8STLuAtSW_Geh4dFeFjK1h6fkL2hOxmvaDcyyOF8an8cOBYjDGsHjaksrkL5UjPfazZSQycxzdifJAE_J9FTjs65WHTZZkMYT_lvbYm1kf43w-umI-uK_i1j3Z1KfS4NsiVSMqZj73nk/s400/ndr2.jpg)
Note: Disabling the Email Address Policy for your Organization Config does not effect the rest of your recipients. They will continue using the Email Address Policy as normal.
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