Yes, here it is, the proof my mail went to Mars and landed there with the Mars 2001 lander that was sent by the NASA.
In 2014 I received this wonderful prize from Sweden. See for all the details their website:
Ruud Janssen is a fluxus artist engaged in mail art. He is the founder of IUOMA (International Union of Mail-Artists), and he also led the way for art on the internet. His outbursts of creativity colored the whole digital revolution – since 1996 we’ve been able to see his artistic work on the web and we are still able to follow his new mail art thanks to his blog.
By using the intermedia network Fluxus he also conducted original interviews with fantastic people from all corners of the world.
Thank you for all your letters Ruud – here is a gift in return from us!