Our servers will refuse to accept email from known sources of spam mail
Different to filtering, we use blacklisting to block emails from known spam sources, and we use greylisting to delay emails from new spam sources long enough for them to be blacklisted. Currently around 95% of all email in the world are spam. These technologies help us reject many of this massive number of emails before they are passed to the anti-spam filters. - This feature is part of the Email Server Module and was added to all our systems on 30th September 2005.