"Require that all senders are authenticated" not working properly
Exchange 2007 has confused me again.
I'm creating a distribution group just like I always have. However, when I created the distribution group "email@example.com" and sent an email to it from my yahoo account, I receive a bounced email that says Exchange will accept emails only from authenticated users. I've never had this problem before. I went to firstname.lastname@example.org's properties, Mail Flow Settings, and removed the check mark for "Require that all senders are authenticated." Now, email@example.com can receive emails from firstname.lastname@example.org. However, none of my other distribution groups have this problem. They still have "Require that all senders are authenticated" check marked. For example, email@example.com works with the check mark. Did I miss something?