Contact form in node
Node feedback module offers a check box on the node form asking the author to allow the visitors of the node to send feedback/request for the node using the personal/site wide contact form. It is also possible to view URL from which node, for that you have set token. See the below image, possible to set available fields token.

 

For Drupal 6:

Author Contact shows a contact form that contacts the author of the current node.
You can set the tokens for title to show in email as well as in fields. I am using this in my website see the Interested in this Property