"from" vs "envelope from"

I have an account with a bad spam filter. (deactivated because of LOTS of false positives) Is there a way to display the “envelope from” or “return-path” instead of the possibly forged “from” when viewing an E-Mail? (I know i can always right-click and get the header, but that’s work I am only willing to do when I already suspect spam.)

Yes, more control over what to display from the header would be awesome!