Until such a time as I can copy/paste into mail without formatting what I've done:

open TextEdit
In the menu bar TextEdit/Preferences
Make sure the Format for open document (under the Open and Save tab) is set to Plain text

then I keep a blank document open. Whenever I want to copy/paste a bunch of stuff into an email, I paste it into that blank document first. This removes all formatting including reverse printing and makes it plain text to then copy from the TextEdit document and paste into the email.

Yeah, it's an extra step but it works.