efa-project.org

I've been a long time user of EFA but recently I've been more curious about what submitting the drop down for SA Learn as HAM or SPAM actually does on the back end. I've read that you want to give it a good sample of HAM as well as SPAM to help it learn for your environment but is that all something that's stored locally? Is it uploaded to the cloud to aggregate reports and get included in updates, etc? What types of things does it use when you report a message as SPAM, keywords in the subject? where it came from? what? Thanks in advance for any detailed explanations anyone can provide.