outlook

Outlook, in typical Microsoft head-in-the-sand fashion, does not import mail from thunderbird. This is particularly pathetic because Thunderbird uses the Unix mbox format with only minor modifications which are limited to additional headers that Thunderbird uses to keep track of message status. Yes, it is a sad day when you are importing mail from an Open standards-based file (Mozilla-based mail programs have always used mbox format with an additional status header) to a proprietary Microsoft format. I had to do it, and if you are reading this, you probably have to do it too.