When you say the email headers, do you mean Internet message headers?
Currently, Flow doesn’t have a dynamic content for Internet message header. I am afraid that there is no possible way to indicate that whether a message was originated by an automatic process currently.
Thanks for sharing and voting the idea you provided, I will suggest other customers who have the same request vote the idea as well, PGs will take hot ideas into consideration first.
Community Support Team _ Mabel Mao If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.