Hi Team

Our customer setup send email to them mail server, because of them mail server using the self sign certs, then there is a errors

level=error ts=2021-02-24T16:49:13.421Z caller=notify.go:372 component=dispatcher msg="Error on notify" err="send STARTTLS command: x509: certificate signed by unknown authority" context_err="context deadline exceeded"
level=error ts=2021-02-24T16:49:13.421Z caller=dispatch.go:301 component=dispatcher msg="Notify for alerts failed" num_alerts=1 err="send STARTTLS command: x509: certificate signed by unknown authority"

Follow the prometheus setup we had a workaround fix the problem

email_configs:

• to: xxxxx
  from: xxxxx
  smarthost: xxxxx
  auth_username: xxxx
  auth_password: xxxxxx
  require_tls: false
  tls_config:
  insecure_skip_verify: true <====== add this can fix the problem

But customer want to add them certs in alertmanager, I check the configmap manager by operator, so we can not add it by manual

Customer want to add self sign certs in the alertmanager cm

Thank you