Your alertmanager config is broken. "receivers" needs to be a list, as does slack_configs, and the settings need to be indented. I doubt you're even able to start alertmanager with that config.
You posted images rather than text, so I can't copy-paste your config to fix it, but here's a different one showing the required formatting: receivers: - name: brian email_configs: - to: br...@example.com send_resolved: true -- 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/0ff69689-ff65-44c7-a717-dc696dd14846o%40googlegroups.com.