eFa stands for Email Filter Appliance.
The idea about eFa is to create a (virtual) appliance for spam fighting using open-source tools.
We try to combine existing open-source projects into one easy to use and fast to deploy (virtual) appliance.
eFa is a community based product, we try to create the best possible spam filter product out there based on existing open-source software. See the about page to find out which existing project we use to combine, tune and support to create one great appliance.