Anti Spam Lotus Notes -

Administrators can create server-side mail rules to block malicious domains or keywords within the body or header of messages.

Notes/Domino has a "MailMaxFilters" setting. More than 100 rules can significantly slow down the router.

Anti-spam strategies for Lotus Notes (now HCL Notes/Domino) in 2026 involve a combination of built-in server-level controls and user-level client tools to manage junk email and phishing attacks. Modern approaches focus on using SMTP-inbound edge servers, SPF/DKIM validation, and third-party tools to handle sophisticated spam, as native filtering alone is generally considered insufficient for modern threats. 1. Server-Level Anti-Spam Measures (Domino Administration) anti spam lotus notes

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

Suggest recommended by the community Let me know which area you'd like to explore further. How do I control spam and other junk mail? Administrators can create server-side mail rules to block

Enable SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) on Domino 12+ servers to identify and move untrusted mail to users' Junk folders.

Users can select junk emails and click More > Deliver Sender's Mail to Junk to manage unwanted mail and train the system. Anti-spam strategies for Lotus Notes (now HCL Notes/Domino)

If phishing emails pass through, they should be reported to the IT department for blocking at the server level, rather than just using personal junk folders.