Via cedric (on IRC):
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. 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.
If you (have to) use Microsoft Outlook for your e-mail needs, you really do need Outlook-QuoteFix – I didn’t know it existed up till now (I knew there was a patch for Outlook Express only), so that’s quite some good news… Outlook really isn’t that bad, but there’s still a few things I don’t like about it before I could use it on my windows box as my email client…
Fwiw, I use Evolution 2.6.3 via Remote X (Cygwin) on my Windows box 😉