Do you ever wonder what your email looks like to a recipient? Is the format right? Does it contain all those #@%*! email tags at the bottom?
To test your email, compose a short message and mail it to email@example.com. Once sent, go to http://www.allrealgood.com/format.txt to see your message on display (If you don't see it, hit reload or refresh on your browser).
Obviously don't send anything confidential - your message will remain on the site until the next one is posted.