Tantalus is an anti-spam Sendmail milter that keeps bulk emailers from
guessing usernames by rejecting servers that guess a configurable
number of invalid users within a configurable amount of time.
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.