Diagnosis alter on port 25 but email are OK (false positive ?) - Alerte port 25 mais emails OK (faux positif ?)

[Mad]

Have a look here: This did fix it for me.

Extended Berkeley Packet Fillter (eBPF) disabled for non-root users

I did set sysctl -w kernel.unprivileged_bpf_disabled=0 and now everything works again. This is a pretty bad bug, as it seems. :-/ Til the bug is fixed I set this to /etc/sysctl.d/local.conf kernel.unprivileged_bpf_disabled=0 Although, it has a reason, why this change happened… So may not be the final solution.