To remove the PageWrapper from the email, you can change the URL for the link to the email by adding &printer_friendly=1 to the end of the link.

For example, for a page to be shown without the wrapper, change:

http://www.yourorg.org/site/MessageViewer?em_id=123456.0

to

http://www.yourorg.org/site/MessageViewer?em_id=123456.0&printer_friendly=1