SACI is a anti-spam, anti-virus and anti-pishing solution to work in the Cloud, and it can be attached to ANY flavor of email servers, including Postfix, Exim, Sendmail, Qmail, Dovecot, MS Exchange, Lotus, and all others.
Developed using CakePHP2 Framework, and a backend with Postfix and MailScanner, it is cluster based solution and you can setup various nodes/instances to support the charge of bilions of messages.
Unzip SACI.zip to /var/www/html then run as ROOT ./install-centos-6.sh
Fork this project and make pull-requests. Whats to Develop? Authentication Authorization