That should already be don by now. I canâ€™t report spam any more without replacing the IPv6 address in the header. My provider is routing the e-mail internally all over IPv6, since some time early this year. So all mail has a IPv6 address in the header. If spamcop would at least give an error message indicating that IPv6 is not supportet yet. Instead only the Message â€œNo source IP address found, cannot proceed.â€ is shown without any indication of IPv6.