Well, it has nothing to do with the protocol.  Like you said, POP3 is dead simple.  This is within logic that sits above the protocol.<p>That said, yeah, this is something they definitely should be testing.  The fact that the article updated yesterday with a new knowledge base article and the status of the problem says they are looking into it, means they&#x27;ve been notified but not yet fixed it.  If they haven&#x27;t stopped that update from rolling out, someone at MS may come back to very unhappy managers on Monday, and have to explain why they thought leaving a data destroying bug live over the weekend was the right call...