Function epl_populate_post_author_email

Gravity Forms Filter for populating contact form with author email address

Create a gravity from and add a hidden field and enable "Allow field to be populated dynamically" option on the advanced tab. Use author_email as the Parameter Name and when a form is submitted the email address of the author of that property/page/post will be added to the hidden field. You can then setup the forwarding and notifications directly to the author as their email will be part of the form.