How do I set the node's author as the recipient's email webform?

Hi,

I'm banging my head but I can not do: this question has probably already been made but I have not found an answer. I need urgent help!!

I entered a webform into a block and only appear on a certain type of node. My need is that the email recipient is the author of the node where you are sending the webform. In practice, how do I set the node's author as the recipient's email webform?

I also integrated token with webform but the token author-node is not ...

Thank you in advance, and excuse for my english...