Cloudmark Server Edition (CSE) is an Anti-spam and anti-phishing plugin for Microsoft Exchange Servers. CSE utilizes human feedback--millions of users in over 160 countries--in real time to block spam, phishing, and additionally many viruses and spyware. Leveraging a Trust Evaluation System (TeS) and technology, feedback is corroborated in real time, so that only a few people ever have to see a spam E-mail before it is blocked for everyone. Spam is automatically moved to a Spam Folder.

CSE requires no Exchange reboot or client-side software, and no rules or lists to maintain. Signatures uniquely identify E-mail with no IT administrator intervention required.