I'm searching for one of these email authorization deals that combat spam.
in that if an email is received the user sending the email has to confirm their address by clicking some link in the returned email. once that link is clicked the original sent message makes it way to the recipient. this only has to be done once then that address is allowed
i'm not sure this is exactly how it works. but something similar to this.
i have linux redhat running WHM and cpanel. any help would be grand.