The CreateOrCommentHandler has a "stripquotes" option that is meant to remove the quoted portion of the text. We have two ways of doing this. One way for Outlook and one way for every other mail client that has ever existed. In the Outlook way we look for the string "---- Begin Original Message ----" to know what to strip. However, it appears that Outlook 2007 only adds this when replying to text email. If you are replying to HTML mail, then Outlook doesn't add that. The result is that the Handler can't stripquotes.