How to auto-reply to reply-to field?

I would like send auto-reply mails to email addresses written in reply-to field. How this can be achieved?

  Sample Mail Received :
 
 from:  abc@gmail.com
 reply-to:  def@gmail.com
 to:    ghi@gmail.com
 date:  Aug 31, 2020, 12:43 AM    

By using the template and filter options I am able to send auto-reply e-mails to addresses written in from field (abc@gmail.com in this case). But I am not able to figure how to send auto-reply to addresses written in reply-to field (def@gmail.com in this case).

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Author: deepak sharma