Marc Perkel wrote:
It isn't even a forgery tool because if will return a false positive of forwarded email.
If the domain owner doesn't want his domain to be used as sender address in email not sent by his servers, then there is no FP. It is a policy enforcement.
Feel free to accept such mail, but don't complain to the domain owner in case of abuse. your server, your rules. Their domain, their policy.
anyway, uncontrolled email forwarding create problems. so there is a need to "control" it. some "Best Practices" are needed here. If I setup a .forward on your site and forward a lot of spam, what are you gonna do? (there is no proof that I forward spam intentionally).
