Exchange Server and Outlook 2007 RSS Feeds
Every other day, my mailbox at work was reaching its size limit despite moving big items to a personal PST file. I couldn't figure out why it kept filling up so fast. By analyzing folder sizes, I discovered that RSS Feeds in Outlook 2007 count toward your Exchange size limit, and one of my RSS feeds was taking up a lot of space. After I moved the old RSS feeds from the feed in question to the personal PST file, the problem went away.
