By now I am presenting my own application 'fake mailer', with this mail application you can send anonymous mails to your friends. I did not build this application to do illegal activities. It's just for the fun, and trolling your friends.
I build this application a few days ago.
If you like my application, please leave a review.
You can find it up here; http://windowsphone.com/s?appid=79e9...3-8c5b79081577
I hope you like it!