There have been many postings about Microsoft’s recent announcement to use Ironport’s Bonded Sender Program as one of its many tools to fight spam and reduce false positives. I won’t belabor them here, but there are three common misconceptions I’m reading on the web and in blogs that I thought I’d point out and try to clarify. Misconception #1: Bonded Sender is a Microsoft product, and Microsoft will profit from it. Why it’s not true: Bonded Sender is operated by Ironport, Inc., a completely separate company from Microsoft. Bonded Sender and its cousin, Sender Base, are used by over 20,000 domains. Microsoft is just the latest, and highest profile, user. I don’t believe that Microsoft is making any money from…