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)
Configure DNS Blacklists (DNSBL) to drop connections from known spam hosts before they enter the network. anti spam lotus notes
Enable SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) on Domino 12+ servers to identify and move untrusted mail to users' Junk folders. Many administrators use tools like MagicSpam