Scam-backscatter is a milter that prevents
backscatter on mail servers which don't host
mailboxes locally. It validates mailboxes by
verifying the recipient addresses hosted on a
different mail server.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.