Send message to post author

I use Contact Form 7 for a job board application submission

When clicked, I’d like the message to be send to the Post Author (the company that submitted the job listing). However “[_post_author_email]” doesn’t work anymore, so I don’t know how to send automatically the message to the author of the job listing.

I’d like to avoid to oblige them to log in to post a job, and then use “[_user_email]” (if that even works).

Any solution to this ?

Link is a draft as example

The page I need help with: [log in to see the link]