Hey Everyone -
Im trying to create a distribution list in Exchange 2010 in SBS 2011. Im using existing user accounts/mailboxes in AD, but need to accept emails from the outside. When I create the list, I check that in Mail Flow that "Authenticated Users" are not required. However, I'm getting a user not found error when sending email to the groups.
Note that I did create the group in Exchange 2010, not Active Directory. Not sure if that helps.