. Watchguard SpamBlocker provides real-time spam detection for immediate protection from outbreaks. It\'s the best solution in the industry at distinguishing legitimate communication from spam in real time blocking nearly 100% of unwanted emails. Spam accounts for up to 95% of global email and remains the most common method of spreading viruses. It bogs down network traffic and leads unsuspecting users to malicious web sites designed to steal sensitive personal and company information. Pervasive as it is you still have the ability to stop spam cold by adding a SpamBlocker subscription to your WatchGuard Firebox M400 security solution..