This is a great design and effort, but I think you are missing the spirit of the campaign. You're fighting fire with fire. It's like fighting the drug problem by selling drugs. I wouldn't send an email and ask people to stop forwarding and then ask them to forward your email, isn't that what you are trying to stop?
The design is pretty good, very simple and clean. However it isn't very engaging for an email. An email needs grip people within the 2 seconds of looking at it, this doesn't do that for me. I probably would delete it before knowing what it really was.
Hi Code Dude.
How about using a picture of a side view with someone having a paper shuved in their face or their computer screen lit up.
For the type on this. I would bring in the letter "i" closer to the "n" in Real Stinkers". Also I would bring the 't in the word "don't" closer to the letter "n" (in your title).
I would consider maybe using red associated with stop for your titles and "orange items.
I would consider bringing the sentences closer to each other (the leading).
Best of luck on this letter, sounds good.