For a few months now, elastic.org has participated in the SPF email verification system to limit spam and forgeries, in both sender and receiver roles. As of today, we also participate in the DomainKeys anti-spam/forgery system, thanks to new support in the exim mail software. These measures, along with our established aggressive SpamAssassin and ClamAV installations, we are trying to model all the best technologies to clean up Internet email.