First: change "receiver: default" to "receiver: team-emaillist". This will check whether the SMTP part is working properly, as all alerts should be sent out.
Then start adding some matching routes. The route you have given will match only alerts which have both alertname: KubeNodeNotReady *and* severity: warning (with lower-case "w") > -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to prometheus-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/c762fd8e-369f-490a-b766-cb0b0d5424ab%40googlegroups.com.