Distribution List Not Getting Mails From Outside – NDR 5.1.1

When you create any distribution list with Exchange Management Console – EMC or Exchange management Shell – EMS in 2007 by default Sender Authentication is Enabled to prevent unwanted messages from spam.

Let’s say I have created a group “Group 11” in EMC and when I check the Sender Authentication setting through shell it shows enabled.

 

Get-DistributionGroup “Group 11” | Select-Object Name, RequireSenderAuthenticationEnabled

 

Now if you don’t disable it then group doesn’t get any mail from outside of organization and  sender gets NDR 5.1.1 which means Exchange doesn’t authenticate anonymous incoming connection for this group and reject it with this NDR.

So don’t forgot to disable the Sender Authentication after creating any groups in Exchange 2007.

 

Disable the Sender Authentication

Set-DistributionGroup “Group 11” -RequireSenderAuthenticationEnabled $False

Verify once it is disabled.

Get-DistributionGroup “Group 11” | Select-Object Name, RequireSenderAuthenticationEnabled

Hope this helps who are migrated from Exchange 2003 to 2007!!!!

 

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