Outlook-QuoteFix can modify MS Outlook’s message composition windows on-the-fly to allow for correct quoting and to change the appearance of your plain-text replies and forwards in general: move your signature, use compressed indentation, customize your quote header, etc.
Quoting & Formatting
If you use Outlook as your email client and make use of plain-text messages, you will have noticed that Outlook doesn’t exactly feature the most intelligent quoting algorithm; in fact, it’s the silliest one imaginable.