how-do-i-make-an-exchange-2007-distribution-list-accept-external-emails

Hi, You can solve it by doing the following 1. Open the Settings for this group and switch to the tab "Mail Flow Settings". 2. Mark "Message delivery restrictions" and select "Properties". 3. Ensure that the checkbox "Require that all senders are authenticated" is not selected. /MartinExchange is a passion not just a collaboration software.

Hi, The following article will help you: Configuring Exchange 2007 Hub Transport Role to Receive Internet Mail: http://msexchangeteam.com/archive/2006/11/17/431555.aspx Please feel free to let me know if you have any questions.best regards, serena