How configure email alert

[grigaux]

Hi,
Sorry for my English, i'm French.

I installed the kube-prometheus project on my cluster, everything works perfectly but I'm stuck on the configuration of email alerts.
I see the alert rules created in Prometheus in folder Mimir / Cortex / Loki but I do not receive an email alert when a rule goes into firing.
In Grafana, i configure Contact points, test is ok but not received email when rules is firing.

At what level do I have to intervene to receive automatic alerts by email on the alerts created in prometheus. do i have to configure grafana or alertmanager?

Thanks.

Guillaume