There may be an easier way to do it, but I use a small bit of code. For example, to get the above I used:

(quote=PVP)How do you embed a previous mail in a response??(/quote)

You must replace the the curved brackets "()" with square brackets "[]". I used curved brackets to stop it appearing as another quote.

It you don't want to mention the person you are quoting, just don't use the "=PVP" or replace PVP with whatever you like.