In a customer environment we were facing multiple server crashes and could isolate the problem that the DKIM check is causing the issues. The servers are running on Windows Server with HCL Domino 12.0.2 FP8.

We afterwards disabled the DKIM check and the servers ran stable. We also had enabled SPF check but this did not cause the crashes.

After opening a case and creating debug files we received a HotFix which has been installed on one server today to check if the HF is solving the problem.

If you’re also facing server crashes with DKIM check enabled you can refer to the following case when opening a case at HCL Software Support: CS1471530

A great thank for working on this issue to Niels Groot !