efa-project.org

When I receive a spam or an high score spam i deliver it in Exchange user spam folder.

It will useful a way to bounce back in addition a message to the sender that inform about this action
And will be useful that this bounce occurs 1 time only for each sender server ip address a day so if is really spam non more message fill the queue

Sorry, I do not recommend this and this is a major cause of backscatter.