Inside the Clearswift Secure Email Gateway appliance, there is a multi-layer Anti-Spam solution designed to deliver 99% detection with minimal false positives.
The anti-spam feature detects messages as being spam, phishing attempts, or newsletters, and allows system administrators to configure policies to either block, sanitize, hold, tag, or deliver.
...
The secure email gateway no longer works for business email compromise and advanced email threats. Discover why you need the Fortra Advanced Email Security.