IT Support Services Blog » Exchange 2007 http://www.offsitenoc.com/blogs One Click Remote Server Support Fri, 16 Jul 2010 17:54:55 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 Exchange Distribution Groups do not receive external emails http://www.offsitenoc.com/blogs/exchange-distribution-groups-do-not-receive-external-emails/ http://www.offsitenoc.com/blogs/exchange-distribution-groups-do-not-receive-external-emails/#comments Tue, 22 Dec 2009 23:04:54 +0000 ajodha http://www.offsitenoc.com/blogs/?p=156 When you create a new distribution group within Exchange and try to send an email from an external address to this group, you will receive a error message which states that you must be authenticated to send to this group.

This is the default behavior of Exchange 2007 to avoid SPAM.

To change this behavior open the Exchange Management Console an navigate to the affected distribution group. Open the Settings for this group and switch to the tab “Mail Flow Settings“. On this tab mark “Message delivery restrictions” and select “Properties“.

In the new Window ensure that the checkbox “Require that all senders are authenticated” is not selected.

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