About Your Spam Signature

All of the anti-spam features that you have configured for IMail Server are collectively referred to as your spam signature. It consists of your specific configurations for:

• White lists (trusted IP, domain, and e-mail addresses)
• Realtime blacklists
• Verification checks
• Sender Policy Framework (SPF)
• Premium Anti-spam
• Phrase filtering
• Statistical filtering
• HTML feature filtering
• URL domain blacklist filtering
• Broken MIME header configuration

If you have too many false positives or are not catching enough spam, you may need to adjust your spam signature.