Since upgrading to Exchange 2010 we've had a problem with Moodle not sending e-mail. We've obviously changed the settings in Server/Email to point to the Exchange Hub transport server with the correct authentication. When a moodler sends a message to another moodler, moodle says, "message sent by e-mail" and the message appears in pop up window it never arrives by e-mail. I have looked at logs but cant see anything.
Am I missing something blindingly obvious???