Edit received messages

I would like to edit received messages, but I do not find how to do it? Is there a way?
Thanks
Zoli

Either than when you replying or forward an e-mail, edit of received e-mail message is not allowed.

Thank you for the quick answer.
Can this action be recommended as a feature for future release?
It is very beneficial, when you want to get rid of unwanted content, and save only what you need.