Setup: In-house Exchange Server 2010 using Postini for spam protection.
An user in our organization is getting his outbound emails to a particular recipient bounced back with an error of "Postini #554 rejecting banned content ##". I have added that recipient to this user's "Approved Recipient" list to no avail.
I'm looking for advice on how to troubleshoot this issue. At the moment, I can't find any log messages for this particular email.