Users can create instant rules based on the sender, domain, or subject line to move future messages automatically to the Junk folder.

Users can select junk emails and click More > Deliver Sender's Mail to Junk to manage unwanted mail and train the system.

Many administrators use tools like MagicSpam, Symantec SMSDOM, or dedicated email security gateways (e.g., Barracuda) in front of Domino for better "zero-day" protection. 2. Client-Level Anti-Spam Measures (HCL Notes Client)