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HCL Domino Ideas Portal

Welcome to the #dominoforever Product Ideas Forum! The place where you can submit product ideas and enhancement request. We encourage you to participate by voting on, commenting on, and creating new ideas. All new ideas will be evaluated by HCL Product Management & Engineering teams, and the next steps will be communicated. While not all submitted ideas will be executed upon, community feedback will play a key role in influencing which ideas are and when they will be implemented.

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Inbound SMTP DDOS Detection

Inbound SMTP Intruder Detection

Prevent from smtp denial of service attacks, when Domino gets bombed with inbound mail from one address. Domino stops routing mail if this happens, the error logged is:

"Router: Error searching mailbox file mail*.box: Insufficient Queue Space - Router message queue is full".

The solution is to bring down the affected server in order to clean up the mail*.box databases.

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    • Guest
      Feb 21, 2024

      Hello Thomas,

      I was not aware about the term "push back router". Could you name a product? This sounds like an additional component, what is sincerely not the best choice over a Domino implementation. I still believe that Domino ist the best component to do this job, because Domino already has all information which would be necessary to recognize such an attack.

      Regards

    • Guest
      Feb 20, 2024

      Locking the source ip or locking the user (if smtp auth is used) if a configurable number of requests per time frame is received would be fine, no additional hardware or software needed.

    • Admin
      Thomas Hampel
      Feb 20, 2024

      a viable approach to SMTP server DDoS protection is to deploy push back routers as intermediaries between the senders of email and the receiving server

    • Guest
      Feb 20, 2024

      Great idea! Why is such an important feature still missing?