I have a newly deployed Exchange 2010HT as part of my 2003 transition. I realise after the installation of the HT server role (no 2010 MB yet) mail from some the internet servers are failing with the 530 5.7.1 Client was not authenticated error.
I am using the "Default Server Name" receive connector with Annonymous users enabled on permissions group. I am using TLS, Basic, Exchange and Integrated windows Authentications. on the connector
Email from many other internet domains (e.g. yahoo.com) are delivered but not gmail.com for example.
What could be missing?