This web site has some useful data and utilities for email administrators, allowing you to see current and historical figures on email and spam from your server(s). And to run some basic/simple tests on your server or ip address.
The MyRBL database is created from data feeds coming from all the SurgeMail servers in the world, each one sends in figures on each ip address recording 'interesting' information such has how many users have marked a message as spam or not spam, and how many messages contained SURBL hits, and how many messages were from known friends etc...
We hope this will be a useful resource please don't hesitate to let us know if you think of other tools we should add to this page.
See this page for a detailed description of how this database is used within SurgeMail to help prevent spam: http://netwinsite.com/surgemail/help/myrbl.htm